STOP characters are not very good for 1/2 decks. There's a very high chance that you'll end up with characters with neither ability nor bonus. Trust me, plain 6/5 Janice is very sad.
Ulu Watu really needs at least 5 characters- you've got to have their bonus.
Junta is ok with 4 characters, but they have to be the right characters, such as Naginata, Bryan and Trish, all 3 of which can make a difference even without their bonus. Unfortunately that is also 12*.
Neither clan has especially great 2* characters, which is also a problem.
13* for Ulu could be Nanook, Felicia, Lin Bee, Gabrielle, Taigo. If you have 14*, upgrade Taigo -> Gaia or Janice.
Again, I think there are inherent problems with Ulu + Junta, but I would suggest something like: