Can anyone help with why it doesn't want to start with the same game version and mod list
modthespire output error - https://justpaste.it/2dqzn

A few suggestions:
The Jungle - New Act
Ratmod - relics
Spikes relics - relics
Conspire - relics and enemies
Strawberry spire - relics, cards, enemies
Mimic mod - adds a chance for chests to be mimics
The gatherer - a nice character your like
The sage - interesting character plus special rare upgraded potions

I would heavily recommend adding all of these and it has been tested they all work together and are great additions