Here are items I think that could use improvement. While some may affect scholar these are some major key points that drive me nuts.

-Bane - 3 target limit, why does it only go to 3 targets. BLM gets all, DRG gets all, wait all classes have multiple AoE's that hit all targets.
-Tri-Disaster - Does anyone use this? Needs to be gutted or tweaked. Maybe complete overhaul which would make SMN's potentially more viable.
-Fester - Amazing ability but would be nice if it had a contagion like effect. Hits for potency of 100 for each effect and adds an additional 5 seconds per each effect on target.
(Or maybe a flat 10 seconds to each effect on target)

These are just some basic thoughts even though I think the Fester idea is brilliant as it doesn't effect SCH and helps with mana issues of reapplying dots. I love using SMN but like everyone else I find it easier to use BLM in dungeons. So I use SMN for all my maps including solo'ing Peiste and leave BLM to dungeons.