About Aran Weapon Speed

Does every skill of aran's depend on the weapon speed? Since I know there are delays to their skills, I'm just wondering if it'll be better to use an arcglaive or a chelbird if speed is capped anyway. Also, would speed infusion make both types of weapons on par with speed, and if not, would a red surfboard with or without SI be the same as an arcglaive, since I believe aran's booster is 3 speed up. Thank you in advance~

I think they are (besides maybe their buffs and Combat Step). I know Double and Triple Attack depend on weapon speed, so the upgraded versions (Full and Overswing) probably do too. I don't know about finishers and other things like that.

Basically, just take the weapons normal weapon speed and subtract 3 from it (5 if you're using SI). All Snowboards will hit the speed cap with SI, and I think most normal polearms will hit at least Faster(3).

Also, it's not so much delay as it is "you have one second to hit x key to use y skill after a Triple Swing, otherwise you'll just start over with a normal attack".