Light spirit can have a healying intelligence adjustment when puppets and NPCs get their healing intelligence adjustment.
Except puppet and NPC healing is far beyond Light Spirit in intelligence already. This is like saying DRK shouldn't get any new crit WS unless WAR gets one. A Puppet will heal you, unless you are debuffed, every single time you got a light maneuver up. A Light Spirit will only heal you if they can see you and you are closer than all other hurt people and below 30% HP.

No player can cast spells from that range.
I just know stuff like Cerberus paralyze is 20, and WHMs cure from outside it, so I picked a random number higher than 20. I just mean the same cure distance a WHM has really.

If you're trying to use light spirit to cure, you're doing it wrong. Spell casting delay is too long.
You need to treat main healing and healing differently. I accept that spell casting delay is too long for main healing, but think that with fixed intelligence it would work wonders as backup healing.

If you want to heal on summoner, sub WHM, and have carbuncle out with Favor.
That is the thing I don't want. Fuck subjob being better than a main job. Imagine DRK/WAR with a subjob G Axe WS doing more damage than any G Sword or Scythe WS. The game shouldn't work this way. And if it should, I want WHMs to require RDM sub to get cure spells. Insanity for everyone, or sanity to spirits.