I like the first three more - I feel that going too low with the Speed will diminish the usefulness of the poke in general and of Weak Armour in particular. Deck Knight has an awesome base 108 Speed - maybe too awesome, so it's my least preferred of the three (it also gives up a bit on mixed sweeping capabilities). Anyway, any of those three would make me very happy with the outcome, the other four...well, not so much.
(also @ Birkal - you spelled my name even worse that the slate does xD please fix that. Juicy and Shrooomtastic too...)
Not accepting rating requests anymore. Sorry!