I assume you're exagerating slightly , but yeah, ToC is a pain to heal on paladin if you're not overgeared and are playing with bad dps (or ungeared tank). Beacon of light can only do so much when you don't know who is going to take dmg and your haste rating isnt high enough to spam holy light on everyone. The "nightmare" boss and last 2 part of the death knight come to mind.
Normal ToC is almost harder than HToC in my experience if you take into account who join it usually (people who recently hit 80)
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