RPG Insanity

I'm like lvl 93 and had gotten all holy weapons ( which was a huge pain in my arse tbh...) But I can't defeat him I know I need to up my stats with power stones but I can only upgrade a specific stat 1 time every hour ( i dunno why tho??? seems stupid) but I can't kill the guy please any help would be greatly appreciated cause that's all I have left to do (asides from maxing skills and attributes)

Use skill nullified magic and nullified physical each turn, cast auto revive forgot what name but it's water skill on laura, only one character attack Satan. Dont forgot to heal each turn after laura use auto revive. use critical ring on Grant is best choice since him attack Satan alone. Must had 600 point at spd stats to do it. Hope this tactic can beat it.

Note : upgrade nullified skill at lvl 2 cause it can be used to all column, best to build it at lvl 3 but cost mana so best stay at 2.

May I ask where Satan is? I defeated Lucifer and thought that he was the toughest boss in this game.

Can we confirm that this is Lucifer, and there's not a seperate boss called Satan? Lucifer is

 

I think these are the skills needed.

 

Grant

Star Defence lv2 - One time avoid damage

Serana Heat Barrier lv2 - avoid physical damage

Laura Angel’s tear lv2 - self revive

Beranrd

Prisim barrier lv2 - avoid magic damage

 

All skills need to be at level 2 by doing that it changes from self to column. Not sure if grants star defence is needed but I put it in the list just in case.

I got a bit confused about this Holies and defeating lucifer with them. The weapons you require to defeat him and attain the trophy are the God weapons, which you get from Envy Shrine - there are Holy Weapons in the in-game shop, you do not need these.