I've reached 50 early last week (to give a sense of my experience). My WHM is ilvl 100

1.) I use Cure 1 when my target's HP is 60-90%. I use Cure 2 from 30-60%.
Is that bad? It feels sometimes like I'm playing chicken with my Tanks.

2.) I have the Ramuh Ring of Healing (won it while BLMing). Is it a good ring for Healer? Is the weathered ring or HA ring greater?

3.) I don't run anything that is 8 manned because I rarely had the need to AoE heal, so I really, really suck (or I feel as if I do) healing as such. I usually use Medica 2 followed by a few medica 1s if I need, even if only 2-4 persons need a heal. I tend to panic, using Divine Seal when I don't think I really need to (nobody over 20% damaged before Medica 2)

I'm using ST to practice since it isn't as Heal heavy