If you're making a deck with Rescue, make a pure Rescue deck. If you're making a deck without any Rescue it really depends upon your play style and amount of clintz. Uppers is a very good clan but expensive for new players.

These are all really popular....

GHEIST/Nightmare
Uppers/Allstars
Bangers/Pussycats

I like to combine clans with + attack with clans that have - attack (Junkz/Sakrohm) or clans with +power with clans that have + Damage (Ulu Watu/Fang Pi)

My current fav is Sakrohm/Pussycats but rather expensive

Best clan Combo IMO, add these clans to any deck and they will be competetive,

Montana (Lyse Teria and your cool! )
Uppers (Gina Glitt and a great bonus)
Pussycats (many unevovled cards)

GG's!

Bangers/Montana(rare but very good)
Montana/Uppers(lacks damage though)
Uppers/All Stars(STRONG!)
Montana/All Stars(STRONGER!)

Wat about all-stars and sentinals
good combo?

The Sentinel are leaning towards a mono-clan.

First reply is correct. Rescue deck just make it a pure Rescue deck. 1 hour in type 1 tournament room, like 1/3 to 50% of opponents are palying pure Rescue decks. Without SOB deck, what else can you do but 1 pill on 2 or 3 of your cards and try to win with your highest damage attack power card with all your pills. If they are clever expecting your bluff, will just 1 pill all your bluffs and take the free damage, with maximum pills fighting your trump card. That's the only way to win even so, because no point fighting every Rescue cards with low pills. All their cards +12 attack power, meaning 2-3 pill fights are wastage of pills. At least Mortana has a 8AP min limit.

I think Rescue deck is too good, Uppers is close too, but not seeing a lot of it.