This trusty insect works with any of them
Big Mother Mouser continues in the tradition of Hangerback Walker and Myr Battlesphere: snowballing effects that can also spread out an army of creature tokens
Yes, in the sense that it has counterplay, it can be removed, and it generates value in a way that isnt massively stronger than some of the strongest value engines in other colors
Kei Takahashi The prevention effect on Kei Takahashi is too small to be significant in most games
Now I dont claim to be the Group Hug expert, but Ive been playing this deck for many many years and got the chance to try about every possible card that could fit to know what works and what doesnt, for example I think cards like Braids Conjurer Adept, Hypergenesis, Oath of Druids & Tempting Wurm (cards that let every player play some cards for free are not great ideas...from my experience instead of helping the players it usually gives a window for 1 of them to win the game, which makes things less fun for everyone else, so I avoid those kind of cards