Trebs are really very good vs isen coz they own ballistats so bad...but gondor needs them to win vs a vg isen player... But good ballista/combos/saroman micro owns tebs if isen has mc
i never use trebs on a rohan army, only on the walls and the statues, vs isen i'll make 2 trebs vs army tops, and thats only because i use knights - gandy - soliders - trebs, and i wont get archers, massing trebs just sucks fanny.
Oh, and i'll use trebs to the max if they are a laggy fucking host