I actually don't like the feed big k strat. Tbh its really funny to watch and a wonderfully creative idea, but every time ive faced one ive beaten it. It falls into a similar category as turbo enchant, in that its going to cost you consistent actions and mana to keep cranking out a 16 mana creature early and then at least one tiny critter a turn. It also keeps you pinned down if you aren't playing a straywood beastmaster as everyone but him needs a full action to cast a creature (excepting Tataree of course but we're not taking about bugs right now). You want at least 3 growth tokens to make it worth the commitment so that's 3 asps and 3 actions you don't have anymore. The last time someone fed big k on me i built up a few creatures then put k to sleep and abducted him. Poor guy never even got close enough to try and wake him up. I bet he would have rather had those 3 asps still generating actions for him at that point. Imho it just takes up too many actions while obliterating your own creatures in the process.
It's fun, it's funny, it's brilliant, but i just don't think it's competitive enough. If you just gotta do it though the arcane duels guys did a pretty good job of it, as did both Sharkey and puddn, and i belive there is video evidence to that effect. Check them out