1) Make your triple damage/casting weaps +18 fully gem with 8% magic damage .
2) go on YouTube type in Multi casting abuse Grand Fantasia AM. Watch video what spells have the same animation that can be cast together write it down. Now go back to game and practice your now Xploit.
3) Also at same time put 3 diff sets buff items on all 3 sprits keep summon all 3 sprits fast get sprit abuse buffs than cast your 3 spells with sprit buffs up your enemy should die in 1 hit .
... This is if you did all AM xploit right.
4) Also use all the CS pots + Lover buffs i seen many AM kill temps in 2 hits thes way.
Now Go Test and Good Luck . AM was the only class never nerfed