At least from the look of him, Yianni could use a bit more power. Spencer, meanwhile, has to take batter care of his body.
They should get together on a kind of Rocky-goes-to-Russia training camp (but in Iowa or New York, not Russia, of course). Spencer could get Yianni to do hundreds of pullups daily and some dips so he can finally get some triceps. Yianni could teach Spencer how to heal and how to bail out when in real danger.