im making a twink healer so far im thinking about disc priest because i have not seen a good hpally or rdruids in this bracket yet probably because of the nerfs.
any class twinked will work amazing. all about the tools each has on top of sick heals. shammys,druids,monks all have great cc and movement. a dispel and or a purge on your team is one of the best advantages in my opinion.
I haven't played since the end of October due to deployments so I haven't been able to play with any of the talent/azerite changes from 8.1 yet, but here is my hpal. Note, i haven't really done any twink runs H/M-ABT during BFA, these were all legion geared toons that I kept at 110 and farmed azerite gear.
I've got a 253 disc/255 holy priest and a 255 rsham, too, but their armories are set to dps specs atm. Priest/sham/hpal are all viable and fun to play. Each has its strengths and weaknesses. Like, disc has more utility than holy, but holy has more raw throughput. The rsham and hpal are both tanky as fuck, but the hpal has much better offensive pressure than either priest or sham, IMO. Theres a few other smaller nuances among the specs, but thats the jist.
I've also got a 224 mw monk thats a work in progress, but im kinda shit at MW and still learning the class.
Haven't played rdruid at 110, yet, but I plan to boost one when I start playing again.