Looking for tips to finish Lone Wolf level 12
So I reached level 12 today ,and I'm kinda stuck especially the difficulty to face the boss , when I start I'm offered to pick 15% augmentation of firepower or sacrifice 20% armor in exchange of 20% damage augment or a 25 % augment of toughness for level 12 and the next level
I even tried to do it with lady death but no luck so far especially when I'm facing the boss it barely scratch his armor despite it's high dps
Any tips on how to pass this level???