Deck looks pretty good for mono Ulu. I'd drop Gaia for Eugene. Similar card, but with a great ability to fall back on, and has great synergy with Stanley.
Ulu's problem is that they're not as well-rounded as most of the other clans. If they were to get, say, one good med/high-star SoB card with respectable damage and a 3* CoB, they would be a good ELO clan. For now, I like to "challenge" myself sometimes by running them in half-decks.
Ulu lack a whole lot as it turns out...they need better Dr's (not much to really soften blows at all)
They also need something to force pillz. It's sad when I'm relying on Taigo every game to actually face up to stuff...I actually pray that Taigo is drawn every game
@ MOnstrosity...I'd say Stanly>Serena simply because Ulu Watu has no heavy dmg cards...and against SOA my base dmg is like 3-4
I prefer the higher dmg and fury-ko possibilities over a more solid card
Taigo Fanny are basically the main 2* for Ulu which you just need there Reef + Gabrielle are also there but they don't see play as much.
Nanook Eugene Gaia are the main 3* for Ulu which are amazingly solid but lack variety in abilities. Felicia + George are good cards for that extra 3* if you need be.
You then got Eddie, Buck , Numar as well as Zack in competition for 4*, Eddie's essentially compulsory, if you have Eddie your not likely to have Numar because 3 + life cards is a bit much.
Ulu Watu 5* are Stanly, Oraya + sometimes Serena, I like Oraya because although she's got courage and can be easily stopped, she's like Aylen in terms of a great lifegap which Ulu Watu lack. But Stanly is just beast even with his confidence conditon.
Stanly Eddie Eugene Felicia Nanook Gaia Taigo Fanny sounds like a decent deck to use, or maybe
Eddie Numar Buck Nanook Gaia Eugene Gaia Taigo would also do good.