Well, I'm not entirely sure where to begin with. I think right now things with mana + CDR would be awesome for him (IF his passive is based off of MAX not current mana), but its more a question of what role can he fill.
I honestly think Blitzcrank could easily be the best pusher/bd'er in the game with these buffs. Overdrive makes his AS insane, and his punch does double damage even to turrets. With just a manamune last game I was hitting turrets surprisingly hard.
I'm also considering builds/skills. I think I may start by experimenting with the newly buffed damage runes in conjunction with his power fist early game. I feel like lifesteal + tear gives him some really strong lane stayability but he is an absurdly poor farmer in a side lane prior to 6 (unless he gets a kill). I honestly think Blitz could work better as a solo.
Frankly, there are WAY too many possibilities with an ability like that to narrow it down very easily. When I approach situations like this, I usually tend to study my own playstyle and what I enjoy (note: I enjoy winning
![Stick Out Tongue :p :p](/styles/default/xenforo/smilies/tongue.gif)
), then try to build around that. I'm feeling like his early game is pretty weaksauce lest you have kills. Example: I played a game (normal game) where I went 1-7-1... then by the end of it I was 5-8-9. The difference there being wriggles + CDR, and I played a very fast, bait-heavy in and out playstyle that involved me getting down to damn near a sliver of hp every fight but always coming back in for more disables and damage.
I'm just typing at random right now since its a bit late. So...
TL;DR = Dunno where to start. I have ideas but I'm still testing what works best. Need to figure out what his major role in a team would be in an overdrive-centric build to be able to optimize it.