So there are some issues, but its still fun, right
When these creatures that force sacrifice enter, it's best to sacrifice them as once the effect resolves they tend to not do anything on the battlefield, and are better in the graveyard for Squall to reanimate
For green, its sometimes indestructible
Regenerate Does Not Stop Sacrifice Effects If an effect says you sacrifice a Creature, that Creature is not being destroyed
One of the more common refrains in Commander is to change the structure of bans so that cards could once again be banned as a commander as was possible before 2014, which would allow the return of Rofellos, Llanowar Emissary and others
Nesting Dovehawk Like many token payoffs, Nesting Dovehawk is disgusting if your token deck includes an infinite combo