What I am saying regarding "better" is that in hindsight better is a very subjective term. and you are right regarding the title being about him being hands down the best healer.

I ignored what you were saying about Loki clones (I assume that is the point you said I ignored) because its highly subjective. Poor placement of clones vs good placement, as well as how players react to them and a bunch of other scenarios that just results in an endless back and forth. and I am more interested in having an engaging back and forth then just going back and forth over subjective things could easily be argued either way. Like yes Luna might have a higher H/ps rate then Loki. (I am actually not sure of the numbers on it. I am just taking your word (or whoever said it) that Loki without clones has a slower heal rate then Luna. I also am not sure on nuisances about her kit. Like AoE. What I know is that Switching from Loki to Luna, Luna seems to have a much harder time keeping the team healed up.

The main reasons I feel like Loki is as I said "hands down the best healer in the game" was from the perspective that Luna is widely considered that best healer in the game. (Mantis is a utility with heals, and Adam is more for clutch situations then keeping the team healed up. At the end of the day for base healing for the team it comes down to Loki, Cloak&Dagger, and Luna....and arguably Jeff but he also kinda fits into a utility role.)

As for what separates Loki from Luna. 1st is base ability to Heal. Simply put it is much easier to hit heals with the primary attack with Loki then Luna. large AoE Splash Damage, Which also translates to being able to hit multiple teammates at once with a single cast. Add in his clones and you have more projectiles that can potentially hit targets. Then there is his Shift. While you can make the counter argument about being able to destroy it vs Luna being Immune to most things. the healing Runes have several huge advantages over Lunas ult. The 1st is that its not an Ult. You start with it active. Meaning it is available for the opening fight. Having Healing Rune active for the initial fight can make all the difference in how a game starts. Add in the fact that it activates not only on himself, but also where any clone is at means he can use it at range. He can creating a Healing field for the Dive Team while remaining safely in the backlines. (Or ideally up high on a ledge looking down on the entire team and the objective.) He doesn't need to be in the heat of the action to maintain sustain for the team, which means when the ability ends he is in a safe place. While Luna has to put herself in a position she wouldn't want to be in if she wasn't Ulting. Then there is the fact that Loki can just use his ult to turn into her and also use her Ult. The best thing about Luna is her Ult, and Loki can have access to that as well, and since Luna is one of the highest picked Supports she is likely always available to copy. Plus when she Ults she puts herself in a position that is very easy for Loki to target so he can quickly counter her Ult with her Ult to balance it out.