Fang pi has a solid 3 star all rounder deck ( i put it on half's if I'm bored or drop one to make a strong 11 half)
ill put these all with bonus Zhu Tang 8/4 with +1 life per damage. Lol what 8 point swing on a 8 power card. (without fury) Kamekun 7/5 + 1 attack per life. First round +14 2nd round after Zhu Tang +18 T_T Shifou 8/5 sob. You dirty old man
either Ralph 7/5 with -2 pow. Easy damage (12*half) Kusuri 7/4 defeat +2 life. Works great with Kamekun to keep his ability up. Or as a blocker (11* half)
the only other clam Imo with a more powerful half is Freaks
FPC is not that good in an elo half...
It's slightly better in an elo full, but too outdated and the decks aren't as stable in winning compared to other clans.
It's really cause they have no power or attack manipulation.
Meanwhile, Vortex is decent, but they aren't good at dealing damage since they are vulnerable to attack manipulation and soa. Dregn meets SOA clan, auto deals 4 damage and takes a whopping 5 stars.
Also, most Vortex halves wouldn't even use Dregn (I only point that out because he's your main example). A combination of Dagg, T Gaank, X-0DUS, Deea, Cyb Lhia and C Wing is what you're most likely to see. The 2* don't fare well against SOA, but the 4* (T Gaank and X-0DUS particularly) still function very well.
FPC has quite a few rock solid cards without even having to dip into their 5 stars. Basically the characters that others have already brought up, plus I have found Fei to be a real lifesaver many times now. He is very versatile and can be deployed against the lights of common threats like Eddie, Sandro, Coleridge, Puff, Tyd, Diana, and the entire Frozn clan.