Just curious, but who were the other two Jumpluff was teamed up with? Grass/Flying has a ton of weaknesses.
Unfortunately, there aren't many types that have great type synergy with Lop's Normal-type. To neutralize the Fighting attacks that Lop attracts, I'd probably opt for CM Mismagius in the second slot, but what of the third? Mismagius can't take physical hits, so a physically defensive Steel or Dark-type to resist Mismagius' Ghost and Dark weaknesses would be good. Of all the (defensive) Dark and Steel-types with a useful stat-boosting move, only these are available to me: Umbreon, Tyranitar, Drapion, Skarmory, Aggron (not that I'd ever consider him). From this list, I'd probably select Drapion. But that means I have a small total number of overall type resistances/immunities, which kinda defeats the entire purpose of TrickScarfing - to lock the opponent into a resisted move - doesn't it?