A few weeks ago I replied to a similar thread saying a resounding, "NOPE." But actually, I've found it pretty useful in Coil. I've only done T1-3 (3 hardly counting for much) and in T1, when the snake was on lowish HP post-split I find it useful to help keep the MT up while I wait for the party to LB his target.

I wouldn't say it's a lifesaver or anything, but it's a little helping hand. I don't use it much more than that, though, and since upgrading my gear I've found it less needed.