I was responding to Laphine pointing out that THF already does what he proposed they ought to do. Both DNC and THF can cap evasion against any Abyssea NM but THF's higher native evasion means DNC has to give up more gear slots to do it. The enmity cap problem is real but I believe overstated, since if the tank stays ahead of everybody else (perhaps with the assistance of TA!) the vast majority of NMs are going to be dead or close to it before DDs start capping; people assume it's an oversight, but I believe it's actually an intended penalty for low-manning.

THF does more damage than DNC if DNC is healing because DNC healing is an all-or-nothing proposition: either your group is counting on you to heal so you're saving TP for when you need it rather than spamming WSes, or they don't so you aren't. You are using Saber Dance furtively, if at all. Two CW3s for a pathetic 1200 or so healed is the equivalent of a 2k+ weapon skill for either of them. I really don't understand how one could come to a different conclusion.