Results from Turn 4
I think this quest ins not working well, When they use his skills no damage us, only damage in normal attack:

Outgrowing a Shell at difficulty hard
Young Acilug I dealt a Acid Attack (SL 13) on Gizmo : hit
Damage dealt to Gizmo: 0 ( 0 -50 ) Physical HP

Acilug I attacked Gizmo : hit
Damage dealt to Gizmo: 55 ( 105 -50 ) Physical HP