Anyone know of a good Ash of War for 'Sacrificial Axe'?

[Fried Noodles]

I've been able to get my Sacrificial Axe up to +8 with the Smithing Runes that I currently have available to me. And at +8, it seems to edge out my Moonveil in damage.
Since it offers me +4FP per enemy killed, I am wanting to try it out.

I got the Glintstone Whetblade thing, so I am able to make the axe INT scaling with magic damage with whatever Ash of War I can put on it... But my selection seems poor.
What's a good skill to put on on a weapon like this?

My alternatives to the Moonveil are Rogier's Rapier +8 (which I've been using Glintstone Pebble on) and the Banished Knight's Halberd +8 (that I put Loretta's Slash on... Bit expensive but fun to use).

[Angarvin]

prayerful strike for flattening foes and regen (only sacred and thunder)
spinning weapon for frost application (only magic and frost)
different roars for strong attack alterations (different roars alter attacks differently)
flame of the redmanes for posture damage (only fire and flame)
stamp upward cut for launching enemies and super poise
and obviouse can't there are always raptor of the mists and bloodhound step