So allegedly curing your party members while under influence of SP-buff is officially verboten. I guess they should get by themselves. Seriously, being a THM I am afraid to invite people to leech off my leves because it surely looks suspicious: a) why did I go through broken system to invite somebody in the first place? and b) why did I need to group if I could solo this?
But even imagining they miraculously solve problems with healing being viewed as an exploit there are more:
Most obvious: using a low damage weapon. This is the way people had been skilluping in FFXI for years. I guess people who made FF XIV have never heard from FF XI players.
Letting mobs to heal up - in case low damage is verboten too. I.e. don't silence WHM-types, if they can absorb - let them at it etc.
Healing kiting - in FFXI you had been kiting to kill but in the new and improved FF XIV you will be kiting to save lives! Mobs seem to be able to regain HP while chasing player around. Let them do it!
There are more, in FFXI there were special ways to quickly level particular skills due to particular weapon/job/monster combo (e.g. a BLM could sleep a crab near the Cloister of Storms and level the Staff skill doing 0 damage with a signet staff).
And here is a solution - don't reward time spent doing job, reward the result. No matter how many cases you investigate people will go long ways to spend most time for the least amount of result. If you want us to kill mobs in leves - reward us with SP for *killing* them, not for doing skills. If you don't reward us - we will keep min/maxing, sorry.