As it was said as you aknowledged 300 for a climb was a bad choice.
400kph is a good exit strategy.
Another one is to use the superior slow speed climb of the 109 (historicaly true) and climb above the nose of your oponent with a speed gradulllty reduced from 250 down to 210. Use lazy scissor to force the Hurri/Spit to seat of their tail (high AoA) and stay in their 10/2hr. Tht way you will gain in 1 min 500m that is enough to roll over them. Mind that some Spit and some Hurri hve some kind of relaxed gravity and will be able to pull the moment you roll into them like straying rockets. But apparts those funny comics it a win win strategy. At least if you hve enough time to do the trick. 1 min is a very long time in a high threat environement
WHat I do usually is to draw my prey away from any fight in a little box of airspace were I know there will be no one. I do that using the fast climb trick. Then I start a wide spirall to force him to get AoA (hence drag). Usually you'll gain 90° and 100m easiliy that way when the speed will hev been down to 250. Then use the Tac described above.
Note you can still do that in a Hurri. This tac work even with a fair amount of E and power disadvantage (I used that in my IL2 A8 against UFO Spits MkIX 2K (singing the Michael knight song))
Regarding the CoD's SPit banking : a spit banking hard can climb just like a spit wing level. So keep that in mind in any fight (more can be said on some individuals).