The mystery of Golden temple!

The weakest one has these stats:

Level: 60
HP: 2,343,500
MP: 50000
EXP: 98550
Avoid: 24
Knockback: 50000
Magic Attack: 320
Magic Defense: 650
Physical Attack: 290
Physical Defense: 480

Those attack values only come out to about 800 damage, I think it has an attack buff though, but it shouldn't be anything over like 1.1k or so just looking at the numbers aside from 1/1s.

So do you think 2 evans and a lvl 72 ranger can kill it? And do the helms drop every time?Or every so often?