Engine Performance

The Mossie is very fast for such a large plane and is best at mid-low altitudes.  Sea-level cruise speed is 325mph with a WEP speed of 338mph, making for something that is faster than Spitfire Mk IX at similar altitudes.  The Mossie has a nice cruising altitude of 8.5K (365mph) or 15K (375mph) and top speed is at 14.5K (380mph).  Altitudes above this result in lower performance.  The speed is a very useful asset though and makes difficult interceptions from several fighters.  You will still have to worry about the really high speed fighters though but at least your speed will buy you time before they can catch you.  Climb rates are basically 2,500ft/min up to 15K, better than a bomber but worse than most fighters.  You don't want to get into a climbing duel in the Mossie and it also doesn't accelerate all that well.  The Mossie isn't a fighter though, it's an attacker, so the fact that it can even measure up against some fighters is amazing.  WEP time is short, only 5 minutes, and should be saved for the final dash into target or egress after your attack.  Fuel range is quite poor at only 43 minutes on full internal fuel with the option to load a pair of drop tanks with an extra 16 minutes total.  Loading drop tanks is a mixed situation as they impair performance during cruise and make you unable to carry full external ordinance, but on a longer ranged mission they are necessary.  On short hops though the internal fuel should be more than enough for a attack and return sortie, you just don't want to hang around too long over the target or take too indirect a path.

Firepower

Wow, the Mossie mounts four hispano cannons in the nose along with four .303's.  I don't really think anything can match up to that very well and they are effective against both fighters and ground targets.  Convergence is not a problem and can be set out to D650 (max) to ensure your maximum long range shooting abilities are best.  In close, the firepower is going to be deadly to anything that falls into your gunsight, almost instantaneously.  Ammunition loadout has two options, a normal and overload amount sporting 150/500 rounds/gun (hispano/.303) or 175/780 rounds/gun (hispano/.303).  Most people take the overloaded ammo situation to get the extra hispano rounds but it does tend to make the Mossie feel a little nose heavy.  500 rounds/gun of .303 is more than enough, 780 is almost silly as it results in more than a minutes worth of continous firing.  The Mossie has external racks for up to 8 rockets and can take two bombs of 500lb's or smaller externally and another pair internally.  The drop tanks will make external ordinance unavailable but you can still pack the internal load.  External loads do cause significant drag though so not having them can leave you full speed performance.  Overall though, 2K of bombs plus all that strafing potential is excellent. The guns really leave you flexible potential to hit targets of opportunity, structures, fighters, vehicles or even bombers (4 hispanos nose mounted absolutely will chew a bomber to pieces).

Maneuverability

Not a fighter but maybe the next best thing, the Mossie handles quite well and can effectively be used as a BnZ'r.  It has sluggish roll rate but that is expected from such a large aircraft.  The major issue is not it's turning ability though, it's the fact that turning seems really bleed speed very quickly in the Mossie.  You really need to preserve your energy as best you can in the vertical as replacing it with acceleration/climb is not very effective.  High speed dives are fine though the Mossie can't compete in a very high speed dive over 520mph. Part of the problem is that the speedometer only is marked up to 480mph and typically you will hear structural creaking and let up long before you actually are in trouble because of handling.

Flying the Mossie

The Mossie, for all its speed, has a tough time of survival in the MA.  There are several other attack planes in the same category that suffer a similar problem of being not quite fast enough or maneuverable enough to deal with some of the top speeds of other aircraft.  The Mossie tends to make any sort of high speed drag race a long affair though which opens the door to run to help.  The best idea is to decied quickly whether you can purely out-run an enemy and do so if it is practical.  If not, then you should be very aggressive and press home your firepower at the first opportunity.  Remember, your 8 forward firing guns outclass anything else in the game and can turn a routine snapshot into an instant kill.  If you have to, Head-Ons are acceptable but you should fire early to ensure you capitalize on the superior ballistics of the hispanos.  You may take some hits in return but a few long range hits are not likely to bring you down.  Your twin engines may also help you limp home if you happen to lose one in such an enounter.

Offensively, the Mossie is not a fighter by trade but in a pinch it could be a decent BnZ'r.  You have to be careful though as it isn't going to replace energy nearly as well as most BnZ'r so you are likely to have fewer approaches on a target before energy conditions start to even out between you and the enemy.  The Mossie makes a great vulcher though against low aircraft on a runway, against light vehicles, or PT boats.

Fighting the Mossie

Beating a Mosquito should not be a difficult task if you start with a Co-energy or advantaged position.  The Mosquito is not a fighter and only pretends to be one.  You need to be offensive quickly and force the Mossie into a defensive stance, which should quickly lead to a kill.  The Mosquito has great troubles replacing energy when it spends it on maneuvering.  It just seems to pay a terrible handicap in that it bleeds energy much faster than most other planes, especially if forced to maneuver, and it is highly unlikely to recover much/any of the energy back in a short period of time.  Even maneuvers in the vertical appear to have a heavy penalty for the Mosquito.  If you can force a Mosquito to maneuver then you should be able to pin him into a corner and finish him off.

When slow, the Mossie is a slightly worse than average turner, or at least sustained it can't hold on for very long, so there is little to fear from it if you can keep it turning for an extended period.  Maneuvers in the vertical should be very effective against it too as the controls on it get mushy and it feels very unstable at high angles of attack and slow speeds.

The most dangerous aspect of the plane itself is the firepower and you need to respect that.  If it has the E to zoom climb with you and catches you anywhere in it's gun sight it is likely to quickly amputate most of the important components of your aircraft (like wings).  Don't allow it to Head-On you, there is little chance you will fly out the other side and the Mossie tends to be such a large target that people often collide with them when they try and break off contact.  Remember, the Mossie has a huge ammo load, centerline mounted guns, and hispanos, which puts targets out to a range of even D1.2 in serious danger if they aren't maneuvering.  Most Mossie drivers won't be shy in throwing out massive amounts of 20mm and if you are sloppy and catch a few you are likely very dead.