yup, rudder turns from the guns are the best evasive you can do with formations. and about the only option you have for buffs with no low coverage defending against zoom attacks (very useful against 163s

).
I use Shift-X to build speed in a shallow descent; speeds up egress, reduces closure rate for attacking fighters and increases the time needed for them to set up the next attack.
also if you set
.speed xxx to something reasonable (280 for bostons iirc) you can use X and Alt-X from a gun position to alternate between level and nose up for the buffs with no low 6 coverage (default autoclimb speed is too severe to be useful.) this really is a last resort though.
theres plenty of tools already ingame to help with this, just got to pracice with em
