strat help (in General)

should i switch from amf to dm and why?

is it true that GA is an SoDs worst nightmare?

Yep.

Looks like you went ahead and switched to the DM.. Personally I think that decision is for the better. When it gets large enough you won't have to worry about GA anymore.. And overall it's just a better fit with your strategy..

DM = Great for quick kills, but teams relying on it usually don't do too well in battles that go on a long time. Luckily, getting rid of EDs is a good way of shortening the battles.

AMF = Great for long battles. Typically doesn't do enough to even be remotely worth the XP until melee rolls around.

AMF/DM depends entirely on who you want to beat.