1.for a guild you should be looking for active forums, some active players so if you need help or something you can ask for it umm thats about it, idk :.
2.umm any deck you think you can use idk i use uppers but i've used bangers, rescue, pirates,roots, montana's, uppers, gheist, pretty much all of em and so far rescue has worked the best for me but whatever works for you thats what i'd go for.
3.and you should shoot for ones either high damage or enough to win you a match or both like for instance damage reducers and then high damagers so that you can trick them and make em waste all there pills to do only like 3 damage or something like that then when they have low pills hit them with your high damagers and kill them