I think the damage scales with strength, got 52 extra on a heavy greatsword +15 with 43 strength.

There���s a talisman that buffs spell duration don���t know if it works on a.o.w

Nope.

I believe that cragblade also adds physical damage, if I am correct it avoids the double-dip into your opponents defenses, so it will feel markedly more powerful

Electrify armament is 0.75* incant scaling (faith portion) so at 80 FTH with the Erdtree seal, that's 264 additional lightning damage (though less in practice as split damage types go through the defense reduction twice.) In short with the right seal and high faith you'll get way better value out of electrify armament.

no unfortunately. this boosts stance damage, and only npcs have stance, players do not. still, it's a fairly low cost buff that works perfectly on a strength build

definitely something I've learned to account for while using it

if you want a free 10% damage boost for pvp, then it's not the worst option, but this is largely made for pve, seeing as stance damage only applies to npcs

why, does it make the weapon all weird or something

WHAT DOSE IT DO "???????

It looks like *****

true, the buff is nowhere near the same as royal knight's resolve, but it has the advantage of being a buff with a duration rather than only applying to the next hit.