Hello,
I made a tool to help me figure out which gear I should wear and I thought others might find it useful too. What it does is it goes through all the permutations of your gear and prints permutations with top healed amounts. It considers healing spell power, mp5, mana totems, buffs and consumables.
Type in available gear in data/text/items.txt, which also has options.
There you can also type the cost and effect of the spell you want to test on. If you want to test for Healing Wave instead of Chain Heal, change cost/value and set "heal is chained" to 0.
It also factors in tier set bonuses for T1 and T2.
Github page