Absolutely no other clan can beat them. Either you use Ulu Watu or you instantly lose. The game will actually forfeit for you to save you the time.
Most clans can beat GHEIST and most lose to them, same as any other clan you face. Its all down to tactics and how you use your cards. GHEISTS weakness is that they can stop bonuses easaly so Nightmare, Skeelz e.c.t keep their abilitys and attack, power, damage maipulation clans can manipulate them.
In T2, Power and Atk manipulators eat them, literary EAT them...
Hmm i had posted on this but it was rejected for some reason
anyways as they said t2 powa, power manip and attack manip all the way. as for t1 like aaabattery said Nightmare Piranas and Skeelz laugh at ghiest
GHEIST are very easy if you plan to encounter them, if you put just one stop card and one heavy base stat card in your deck it is very hard not to lose.
Would Jungo do well against them? They have a good number of Stop cards that don't necessarily need their Stop activated to be solid.