For which mode, and ,,for beginner'' means it must be cheap ?
I'd say Rescue, cheap and insanely easy to use.
Ea cheap since i dont have clintz. and something that works in a mono deck, just 1 clan.
Imho GHEIST is kinda hard... mono Rescue and Uppers+Montana are prolly the easiest since they let newbies learn about low pill (1-2 pills, which means Vortex is kinda good as well as a half deck with Montana/Uppers) bluffing before going for harder meta that Bangers, ulu, GHEIST, and the other clans are in (3-4 pills, variations of 5-7 pilling as well).