Wee lee and tanaereva cr with no penalties
with a half of wee lee tanaereva cr Shaun and fanny you have a half of 14 stats only with 2 2hkos and a giant wall
perfect to team up with your sentinels (exploit copper cr and hawk) skeels (caelus all the things) skakhrom? (best stay away if you want 2hkos) huracan (no exploits but beast clan) and yeah
just keep the next half at 12-15 stars and you have a perfect half for t2
Ulu Watu were never the top tier for DTs because you could never play aggressively with them. Unless you're pulling out all the stops there's generally going to be only one or two 2HKOs in your whole deck and even then a single DR can usually wreck your chances. Plus the clan is all but powerless in low-pill fights so you can't burn pills too fast or you're toast.
Also Ulu Watu just doesn't have as many broken-ass cards as other clans. The most OP card they have is Tanaereva Cr, and he's peanuts compared to Grax and Spyke. Lastly, while they don't have a weak selection of low-star cards, those cards have a lot of weaknesses that cripple your ability to make a deck around them.
tl;dr: They're best in ~30* decks (which the current dumbass point system doesn't favor) with a proper banlist imposed.