I thought he would het beat by the robo pounder, but i guess since the pounder is an interactable mobs (meanibg you con go on him like an actual block) he doesn't do well against spiders has they can climb on his which makes it fmhard for them to hit him
For some suggestions.
Can you try mechagodzilla against the demon slayer mod
The robo pounder against the L_ender's cataclysm and dungeons content mod
Kokushibo from the demon slayer mod against the min's thing mod
Well, that was a weird battle.
Kumonga mainly have extremely high defense, that and is extended range is the only reason he beats most of those mobs