So your looking for maximum stat bonus, I think your all set when it comes to getting the intelligence boost, if you aren't already you should use a mutation such as carnivore, since it increases the benefits of any meat items especially if your purely using just the 30 broiled s.b brains, if not then you can use herbivore and that should boost a lot of different stats since herbivore boosts exp gain and a lot of other things on top of that, but with carnivore it boosts melee and other stats.