20g/day of fish oil

Darn that must be a huge load on the wallet.
Probiotics are basically good strands of friendly bacteria that provide your body with beneficial flora that are essential to a wide range of bodily functions. Most importantly, they will significantly improve your immunity and keep your inner ecological system running like a well-oiled machine.
Digestive Enzymes help your body to better break down and digest food. Basically increases your macronutrient absorption rate (just made that one up

) so you don't waste your money shitting out all your high levels of protein consumption.
Essential Formulas and Jarrow's both manufacture a good probiotic. Jarrow's being the cheaper of the two.