How would we make Grohk a more viable healer?

This post is mainly meant for anyone that would attempt to play grohk as a main/solo healer. I'm pretty gnarly with Grohk but it takes everything I have to make him viable, Grohk is not carefree at healing like some of the other supports (Seris, Ying, Grover to name a few). A couple years ago Grohk received a nerf where his Healing Rain card (Heal an additional percentage amount based on characters total health pool) got replaced by Spirits Grace (movement speed buff when in totem) alongside giving him multiple totems that same patch instead of just one. I'm thinking it would be a great start if Grohk had a card or talent very similar to Healing Rain, possibly bake Healing Rain's 1% total health per tick into his basekit but remove the 10% additional healing his totemic ward provides. With each totem healing at a tickrate of every 0.15 second, grohk can give about 6% health per second per totem (about 18% health per second with all 3 down) which would heal champions In roughly 6 seconds. This of course would sound like a broken mess but it would mean the flanks, damage, and offtank arent getting healed. If you drop 1 totem for players 6% healing a second would translate to roughly 16 seconds for someone to get fully healed (with the 3% buff alone not including the base healing of the totem). To put things into perspective, if we use a 2000 health champion, grohks totem heals for 45 a tick currently, the additional percentage will heal them an additional 20 for 65 per tick, but with tanks lets say at a health pool of 5000 would receive an addition 50 ontop for a total of 95 per tick per totem. At 65 grohk is healing at about 433.333 a second per totem which is rather healthy for a healer that is so confined with the healing capabilities of his totem alone. At 95 he is healing at about 633.333 a second per totem, allowing tanks to feel like the champion CAN heal. My biggest problem I see with people whenever they notice that someone playing a Grohk healer is that they typically immediately say Grohk cant solo heal or that someone is throwing. Grohk absolutely can solo heal and be good at it if you the player are good, but I wouldnt want people to be detracted from playing an awesome champ so I hope this would make him much less stressful to play as a healer. Does anyone have any thoughts on this or perhaps any changes to make him more approachable and viable as a solo healer? Please be respectful in the comments and keep rude comments to yourself.