Thai has a gr8 pool of talent n I'm pretty confident a 5 man Thai lineUp could do wonders (if setup correctly)
However FS currently has few best stock of plyrs so the scenarios depend heavily on Asc result:
If FS loses Ascension:
Prim, Jit, Foxz, PTC, killua/seph
If FS wins:
Prim, Jit, Crws, Killua, Seph1roth
Thai literally has so much talent:
Endoist, Kadoom, JohnOlsen, niffy (duelists) it would be gr8 if they could flex