Montanas are cheap, and they rock. You can get to 1200 ELO rather easily with them, you can be in the DT top 150 rather easily with them, and you can Survivor somewhat with them too. Buy cards to win, then as you make more and more clinkz by winning, you can go to the more fun cards and harder clans.
Well you can go for 2 clan split.
I'd say Nightmare (for glorg) and Ulu Watu for Gabrielle.
They are both very strong clans and you seem to have good cards from them.
But if you want clans that work well together here's a list that shows the clan combination I frequent the most. (Some leaders will be mentioned because they are common with that leader)
All Stars / Uppers
FPC don't see it around much so I can't give you anything on this.
Freaks / Jungo
GHEIST mono or with Nightmare or Piranas
Jungo / Bridget / Freaks
Junkz / Hugo / anyone it's a strong clan
La Junta / Timber for 1 hit KO / Pussycats
Montana / Hugo / Uppers
Nightmare / anyone they could make good half decks
Piranas / Sakrohm / Morphun
Pussycats (don't see them to often)
Rescue mono only
Roots/ All Stars
Sackrohm / Piranas / Anyone because of DR and life gain
Sentinel (don't see them too often)
Skeelz usually mono but could be paired up with anyclan (better if it was a attack manip. clan)
Ulu Watu (don't see them too often) but they could be paired up with most clans
Uppers / Hugo / Montana
If anyone doesn't agree don't spam me because I'm going by the clans I frequent the most.
A thorough understanding of the game is key, bonuses only activate if two different cards from from the same clan are in your hand at the same time. you have some nice cards actually, but for a beginner i would suggest rescue, take your larry and steve, and add 6 more rescue cards of your choosing and you'll have a great deck, cheap effective and great way to start off. i would suggest lea elvira, anita, glosh, suzie (use kerry if you can afford it), sledge, even the low stars are strong because each card has +12 attack from bonus. Later you can upgrade larry to krash (its a direct upgrade because 1dmg+2life is the same life gap as 3 dmg, but krash is always at 7 power whereas larry is weakened by soa.