Not dead, but relatively weak/ average at the moment, due to ongh's temp ban. if ongh's out, they are massive.
SoA? Jean, THE best 2* SoA hands down
DR manipulation: pegh (nova if you need a second one?), zornado in t2
attack manipulation: mindy, rodney, boohma moegura
power manipulation: radek, ongh
SoB is actually not as essential as SoA, if you really do need it though, borss which is not bad
Jungo are fine, you don't see them as much when ongh is banned but they're still one of the stronger clans IMO.
In addition to the cards oracle mentioned, Benicio also warrants mention for ELO, because he messes up lots of powerful cards (Uranus, Marina, Herman, Oshitsune, Clover to name just a few). While they're probably better in the half deck these days, Buba is still excellent in mono unopposed. Ditto for Boohma.
Just play Half until there's a week when Ongh isn't banned.
You could make a decent half deck with like
Pegh, Mindy or Jean, Moegura or Benicio, and Radek.
Which gives you room for a 5s, 4s, 3s and a 2s.