Well, really it all depends on what clan you're going to use, I suppose I'll start at the top and go with All Stars.
5* - Sigmund/Eyrton.
4* - Spudd/Alexei.
3* - Randy, Nathan, Karen, Kang, Davina.
2* - Lance, Loretta, Cesare, Ashley, Miss Jessie.
To make a deck with those, I'd say you're best to go with the 5/4/3/3/3/3/2/2
Out of preference I'd go with Sigmund, Spudd, Randy, Nathan, Karen, Kang, Loretta and Ashley.
That in itself isn't too bad, the only problem is lack of power because that adds up to 48, but with the all star bonus it's technically 50 which is great.
The deck is quite alright - 3 attack manipulators, 2 damage reducer's, a 'Stop' life remover and a heal card.
There's plenty of playing field for that and you could quite easily manage to get to 1200 with that, perhaps 1250ish, which isn't bad for the price.
Ok here is the rest of the post.
There are some cheap and decent (Or maybe Leela awesome) cards that can possibly carry you to 1300s: Leela, Daqun, Billy Hilly, Rosen, and Sigurd. Rosen is purely for the power of Roots since Roots is overall good; Pussycat is cheap awesome half deck; All Star has Karen; Freaks are cheap; Berserk has some usable commons.
Honorable mention: Sentinel has some usable a little expensive choices but overall cheap full deck (very skill based though).
This limits us to 6 clans.
4-star and the rest: half deck materials here, but good ones.
Eddie + Eugene + Felicia(I just like her); Lakit half deck is OK i think; second tier Vertex since you only play for the bonus + 2-star DR;
Frozen is awesome for half deck Eliska among other great commons; Piranas if you are really into SOB but no good 4s there.
The only thing hard to find is cheap SOA, but that's not a must.
Sentinel only works as a full.
Now we have 10 half decks + Sentinel; As you mentioned All-star can go full, but I personally disliked so.
Mix now; I always liked pussycat with another offensive half.
But I started this week by using Daqun half with Frozen; doesn't feel so good
then used Leela pussycat + Frozen, got to 1300+ on Friday.
Will try Hilly Billy deck next week or maybe Freaks + Pussycat
This one is the best so far in terms of stability
from 1095 to 1307 in 1.5 hours yes I know Sunday is pretty easy to a certain point but i'm not asking too much