Using adj mk2 myself with a104 (the only amp i can afford atm) and 2x[Bullseye 8] and [Longreach 4] getting efficiency to 63.1, getting my 7 tiers filled with dmg enhancers, makes a nice little gun pushing 60+ dps (game dps, not entropedia) at ~61% effi, not bad for a 2k UL gun :D