thanks nightskies, as a first time GM, I'm posting to get a feel if others have been placed in same situation, I like the player but the synthesist is a nightmare, 20 str and 20 cha, middle aged to boost his mental stats and resummoned every 10 minutes to boost his eidolon suit, with evolutions reoptimised every level, he doesn't the source book to hand and with so many clarifications and errata online the game stalls very often. I've had make several house rules on the fly.
the barbarian can only rage for so long, and the alchemist mutagens are limited, but the synthesist has 2 pools of hitpoints. and a one in 11 minute chance of being caught with his stats down.
I'll check out GameMastery Guide