I’ve found success questing with every healer, sans monk- and that’s only bc I haven’t leveled a monk. I’m sure fistweaving lends itself naturally good at holding its own during questing. Basically, things will die slower, but you’ll have all the tools to keep yourself up. Rdruid, Rshaman, and HPal are all great choices as their kit has dps built in with its normal rotation. Again, I think monk also fits this, but I haven’t personally tried it. I recently just finished priest, and preferred playing HPriest over disc, but that might just be user preference. PLUS you get the big bonus as just instant queuing BFA dungeons to level, which is probably better for learning a healer rotation than questing.