I scrapped my former IWT setup and just went with assist leader on all my melee while also using the in game option to move and turn towards enemies when attacking, and this method is much much better for me. So with that i will continue to run 3 captains.

Still finding it difficult to get information on stacking buffs and abilities. My first healing spell is stacking and so is it's hot, which is really nice so far for an aoe group heal.