At the time being, Angelic Icon can't be used with daggers or polearms (haven't tested with other weapons). You should be able to use it no matter what weapon you have equipped.
http://l2p.l2wh.com/buffs.html
And as far as I'm aware, on retail, angelic icon can be used with any weapon.
Please, do inform yourself before posting anything similar to the above post >.>
What's that supposed to mean? Angelic Icon could be used with any weapon since the first time it was introduced in the game, and on top of that I didn't see anything related to nerfing it on these forums.
Zoopp probably you read online that AI also should give some bonus for Fists, Polearms etc (doesn't work on dragon-network), but the skill itself can only be activated with either a sword or blunt.