Questions about overhealing

[Eisenhower]

I havent done any reseasrch about Regen. but it doesnt took long to me to figured out that regen UP, aggro everything that the Tank didnot claim when he pull.

As far as I've understood it, all heals pulse aggro from the person healed where the aggro is assigned to the healer. So for every tick of regen, a pulse of enmity is assigned to the white mage. If the tank is too slow to pull AoE aggro before or between ticks, the mobs will aggro the healer, even if the actual value is low.

So far I haven't found any indicators or parser tools for overhealing, which is a damn shame. How do people research aggro amounts for heals? Are there numbers anywhere you can check or do you wing it with the aggro bars on the party list?

[Vortok]

Buffs and HoTs (like Regen) generate a small amount of threat when they're cast (70ish) aside from the actual healing enmity.