You may want to consider kicking out
Its not just the healing effect, its the fact that it can also heal ABOVE that character's current HP count. Sure, my party isn't on the high end of the HP scale, but I can get them that way with the character in question.
If I don't use her my only other options for slot 2 are another one of my tanks (one of which can still get slaughtered there due to weakness to magic), or one of my two main defense-buffers (since they're my most durable casters). The girl in question has the resources to stay there and keep everyone at full speed, including herself. Furthermore, not using her means greenbitch has to do the heavy healing all by her lonesome, so if I end up losing her I'm left with Meiling as my lone source of healing, and she can't heal other people if she's busy healing herself.
Remi would be a great replacement. Her HP/Atk/Def/Mnd/Spd are all wonderful, and she has a +60% Atk/Def/Mnd self-buff. Meiling or resistance equipment can take care of it's side effects.
Rest assured if I wanted to use Remilia I would be doing so.
Also, I have no plans to use the 16F character you mentioned. I know she's great and all, but keep in mind I seem to be the only one not using the 15F one, either.
There is a huge difference in power between wiggle's poison and yuugi's poison.
Is there a way to tell how effective poison is? If there is I haven't figured it out, yet...
Consider using morikko or what her name is
Minoriko can't heal status effects, nor can she do anywhere near the damage greenbitch can, not to mention her affinities are a lot worse. Her main appeal is cheaper spells and lower delay, but the green one doesn't run out of SP much these days and I have more than one healer to deal with the delay.