Aeonic WS Merit Point Recommendations?

Hey,
A while ago, I completed the Deeds of Heroism requirement to get +10 extra upgrades to the Weaponskill merit category. I wanted to ask the audience for their input:

Which Weaponskills do you think are most worth the 5/5 upgrade?

I'm asking from the perspective of: "It's worth it to 5/5 an Aeonic WS because you may actually use it without the Aeonic weapon." (If you didn't know, Aeonic weapons already give the full 5/5 benefit).

Off the top of my head, I think Shijin Spiral is a good choice to 5/5 because as Monk, you can find yourself wearing different H2Hs but you'll still use Shijin to complete some skillchains.

Thoughts on other Weapon skills that might fit this description?

Edit: I'm NOT looking for answers like "Well, that depends on what job you play". Yes, you can 5/5 the WS you need for the fight you're about to do...but the point is to discuss is which Aeonic Weaponskills deserve the 5/5 upgrade for the situation described above.

TLDR: Which Aeonic Weaopon skills deserve a 5/5 upgrade? (This means you are most likely to use the WS without the Aeonic Weapon equipped, usually for it's skillchain properties). If it's a good weaponskill in it's own right, that is a good call-out, but you could also make the Aeonic weapon for the full 5/5 effect.