Re. daggers: Aeolian Edge is quite significantly modified by TP. Using a Martial Knife and offhanding a TP Bonus Fusetto +2 will mean you WS as if you had 300% TP all the time. Very consistent and powerful, especially for DNCs who can Reverse two Edges back-to-back.
I'm not sure about the INT magian daggers: they are likely to outclass Martial/Fusetto if you hold on to TP when you're burning, but if you're able to use AE as close to 100TP as possible all the time, I would stick with Martial/Fusetto. Nonetheless, Martial is available with enough money, and the Fusetto trials are easy to grind out quickly (esp. for DNC).
Re. atma: Not sure what you mean by sacrificing Haste. AE and general TP should have different sets to make the most of your damage output. My set-up looks like this:
Chimera Hairpin/Artemis's Medal (when moon >40%~) or Uggalepih Pendant/Moldavite/Hecate's
Etoile/Soil Belt or Furin Obi/Denali/Charis+2
Not the perfect set; can upgrade with Novio, probably Shantotto pants if you're so inclined, maybe MAB Demon Rings if you're lucky to have them. Just load up on DEX, MAB, maybe INT if you're struggling, and take advantage of any situational aspects when they arise, e.g. Furin obi with Windsday, Windstorm, etc.
Re. atma: Gales is perfect. Things like Beyond and Howling Moon are great (+30 MAB). Brother Wolf is not quite so good (+20MAB) but on the right track. Ultimate and ****'s Guardian are the best for MAB (+50 MAB) if you're fortunate enough to have them. Arguments could be made for Smiting Blow if you don't have TP Bonuses. Hateful Stream could see some use on Windsday, but will probably see most mileage under a brew.