Most people on Eorzeapedia have realized spells like XI are elementally based. So I'm thinking with spells people do not stick, (I for one stick Paralyze like crazy, and its Ice based, my Ice stat is my highest), are because they're elements are statted for that particular spell.
my link to paralyze being ice based: http://www.eorzeapedia.com/wiki/en/Ice_%28Attribute%29
I'll list some of these, some of them do need verification, but if true, that would add a whole new level to statting, people who were THM's couldn't retain that orginal idea of "oh i'm a fire THM and that will be useful" lol. Or it could restrengthen this idea with "oh most of my spells are fire based, that I use, so being statted more towared Fire makes sense", both are better than what most people believe now haha
(this mainly applies to enfeebles, scourge I/II, Banish I/II, Bio I/II, DIa I/II and the absorb spells as well as drain and siphon are umbral mostly, with banish and dia being the only astral spells as thm has) The 2nd version of spells are omitted in the list, just assume they are the same. Note the source is eorzeapedia at this time, if someone has a better one let me know. I check all sites wikis, but this and yg are the only ones that seem to go deeper into elemental stuff.
List of Spells
Poison-Water
Gravity-Wind
Slow-Earth
Bind-Ice
Paralyze-Ice
Silence-Wind
Flashfreeze-Ice (duh lol)
From this is looks like most of the THM enfeebles are Ice/Wind. Plus ice for Flashfreeze. So if one is using Flashfreeze they should stat ice heavier than wind, and if not wind and ice should be equal, it all depends on the enfeeble.
I've also heard that Earth,Ice,and Water are umbral stats, and Fire,Wind,and Lightning are astral, but recent lore combing sounds like all six elements have both astral and umbral in them. Other than that, we don't have a way to increase astral and umbral affinity.
This is kinda just a THM-elemental discussion, not trying to say one way is better than another, I'd just like to see what people have to say.