Best offensive tank setup is simple critical damage and p atk.
+27% p atk
+5% critical damage
-4% Skill Reuse and elemental attack and def.
I also use +14 Limited Cutter +20% Critical Damage Augment and Death lvl8 / Speed Death lvl8 and 3rd SA +7% Critical damage.
Results are awesome.
I am playing in CHRONOS,feel free to pm me in game