Mariner
Thank you, man! I did this with no problem now with 3 tries to get 3 hits... I equipped Mummy Dog with 3 Mystical Talis 1/30 and paired her with FOTD Eddie and Sentinel Golden Son... At the final stage was wasting turns with those two on blocking beneficial effects/gaining shield and Mummy did ''Permadeath'' every time on Harpy then!
Once again thanks for help - you and rest of the guys (and gals) on the forum rocks!
Cheers,
W