@desolutionist so its just about going wide with your win conditions? In my head (again i didnt test i yet, but i plan to get my hands on some rats) the plan still seems pretty wonky.
If you have a rat out and they revoker it, even if you manage to still have CCB open to produce another rat you'll have 2 2/2s sitting there. i doubt the revoker will attack in and allow a trade. if you attack with 1 rat at a time and keep 1 for blocking the clock is still very slow and gives the shops or eldrazi player enough time to find bigger or more beasts with ease. In that scenario you also had at least BBCCC up (to cast rat and produce another) in most cases if i manage to ge to a mana count like that i much rather just cast an EoT hurkyl's thorugh the spheres instead and untap unbothered.
Also you mentioned getting revokers off the table with hurkyl's, in that case arent the rats irrelevant on the board; Wouldnt just going for the tendrils win be the easy part as soon as you resolved a hurky'ls?
It just seems to me that a card that is supposed to act like a secondary win condition but is getting mostly shut down by a playset those decks are playing against you anyway doesnt seem like a good alternative win condition to me. Especially if the succes of the card then depends on you resolving a massive hate card that should win you the game anyway most of the time. Wouldnt those slots be better spend for more Hurky's density or mana?
Keep in mind, those are just some thoughts about the card, i dont want to talk it bad (i actually think its pretty cool tech) and it seems like my arguments are wrong since you are all reporting success with the card.
EDIT: I just got confirmation that my buddy has some rats lying around, i will ge to test it today at fnm tonight.