Heavensward SMN abilities learned in wrong order

So learning Ruin III at 54 is actively harmful to the game.
The spell hits for 1.5x potency and costs over 6 times the MP when compared to Ruin 1. And let's be real, that's still 120 potency, which is less than the second attack in a three-stage melee combo.
So it's hideously inefficient outside of Dreadwyrm Trance. So much so that the only reason to cast it outside of Dreadwyrm Trance is to see the animation. At least it's pretty.
The best thing to do with the spell you learn at 54, is to keep it off your bars until 58. Which is really not great. "Here's your reward, it's really bad for the next 4 levels!"
The skill order should really be
52 - Painflare
54 - Tri-disaster
56 - Dreadwyrm Trance
58 - Ruin III
60 - Deathflare

In this order, you build on the idea of Dreadwyrm Trance, introducing the base mechanic, then the interaction with Ruin III, and finally Deathflare.
Again, with how MP hungry the spell is, there are so few situations when Ruin III outside of Dreadwyrm Trance isn't harmful. Dreadwyrm Trance effectively unlocks Ruin III and makes it useful, but Dreadwyrm Trance is useful outside of Ruin III. Ruin III is not realistically useful outside of Dreadwyrm Trance.

Its alright for traveling solo, since most enemies will die quick enough that the high MP cost isn't an issue, if anything the higher potency helps there. For party based activities though, I wouldn't touch it unless you have Raging Strikes up or a Bard that loves playing ballad.

Too much truth here. Ruin 3 as a standalone shouldn't even exist imo.

I'd much rather see ruin 1 BECOME ruin 3 during trance or something to that affect rather then having more clutter on my hotbar.

As it stands its practically useless in almost any situation outside of trance given the OBSCENE mp cost to damage ratio.

You can still use Ruin 3 when a boss is at less than 10% or something. I think the abilities order is fine.