I think the light version has potential, but the life one not so much. Jade shield costs 7, while mirror shield costs only 2. Therefore you need a lot of life quanta, but you don't really have anything to use it on after you play a jade shield. For the light version, you could either just cast a mirror shield off the mark alone, or do as you did, and as I would, and add a bunch of supporting light cards like miracle, sanc (comparable to SoG) and so on. You could even use SoD, which would be better than improved heal given you're using light and the synergy with sanc/miracle and mark, so there really is no reason at all to use the life version of this deck; the light version is superior in basically every way.
The one thing I can think of that life has that light doesn't is epinephrine, which you could put on a creature before quinting it, but ideally you're going to buff it way up with SoWs anyway, so epi probably won't get more than one extra attack, and so it isn't a reason to use life.
Just as a thought, what happens if you are attacked by a SoW-enchanted creature and you BOTH have reflective shields? Does it still hit your opponent or does your opponent reflect it back to you, like how if you firebolt yourself with a reflective shield, it hurts your opponent?