You still need those FFXIII tips? Hope + Snow is all about endurance, slow battles but on the safe zone (I hate it too), Lightning + Fang (Fang pwns!) is more about endurance/offense and can be a little difficult as none are real good ravager and both is great commandos.
Still, you won't be dragging along with unwanted party members for long.
The best party IMO is Fang + Hope + Lightning, best combinations of classes, Hope is best ravager, 2nd best medic and a great synergist, Fang is the best commando, 2nd best sentinel and saboteur, Lightning 2nd best commando, 3rd best Medic and a so so ravager.