As a flyer of the gun-mobile (A8) I find Yak9's are the most durable fighters in-game.
Most fighters including those mentioned above, die from a solid burst of 4*20mm and 2*13mm, but not the Yak.
They shrug and fly on, less a gear or an aileron.
God help us if we get this durability of a coming yak3, not only faster, but also more manoeuvrable.
Its the only fighter that can soak up close to a buff.
And btw , perk the 3-gun la7.