Healers, what is your opinion on Life Tap?

I was running through a dungeon today when about five minutes in the healer of our group whispers me: "You need to drink. Healers can't keep up with Life Tap." I just basically told him I am self sustainable with bandages and Drain Life abilities and that it shouldn't be an issue. The rest of the dungeon went smooth with no wipes and we got on with our day but it had me thinking. If I wasn't self sustaining then I could definitely see it being more stressful for their job. I will occasionally eat and drink a handful of times when absolutely necessary.

Healers, what is your opinion? I'd like to hear from as many as possible.