This is just a rough sketch for a build that you may hopefully help make bloom. The idea is to bring as many figures onto the battlefield as is realistic and effective.
The general approach is a Master Summoner with a Skill Monkey Eidolon. Add to this a Familiar gained via Eldritch Heritage (3 feat) and an Animal Companion gained via Animal Ally (2 feats, 3 to include boon companion). That's 4 sets of actions right there, plus the summoned monsters. The AC can function as a BBF.
A build could look like this:
1st Skill Focus, Nature Soul
3rd Eldritch Heritage
5th Animal Ally
7th Boon Companion
9th Improved Familiar
11th Superior Summons or maybe Leadership.
...Err, you're trying to break what may very well be the most OP class in the game, for the very reason that makes it broken. Do you feel proud?
In a solo campaign, sure, you're taking 3+ minute turns, that's fine, whatever. At a table, though...
Not to be mean, but seriously, what good could come of this?
Fun to think about?
The animal companion & familiar combination can easily be realized without playing a summoner, though.