It's just a matter of getting used to the patterns. I heal through Amdapor Keep, and I usually have time for 2-3 heals in between dodging the stripes on the ground. And if the group positions the bees well enough (or just kills 'em quickly), they won't impact your movement in any meaningful way.

But I know what you're saying. It took a while before I got comfortable at Demon Wall as a caster.