The High Forest set is especially weak. Being the best and only set for ranger and druid, the set has no damage resistence/reduction. It needs 40/- for all physical damage reduction, 40/- for fire/electric/cold/sonic damage reduction, and haste as set bonus to be close in property to pally or barb set. It will be nice to give it knock down immunity also, since neither ranger nor druid has high discipline, while being able to stand up is critical for a caster. In comparison, both the cleric set and the Rincewind set have kd immunity.
Also needed is a good finnessible weapon so a dex character can be as powerful as a str one (e.g. pally, barb, etc.). A rapier or a shortsword that does positive/magic/divine damage with on hit levels 25-28 should suffice.