Think that's more dependent on having 5/5 Desperate Blows, due to no Hasso.
Not sure if you were talking about Rune Chopper (which you would have Hasso for, no sense not being /SAM) but for the rest of your post, the situation is actually worse: Desperate Blows doesn't apply for one-handers either.
This is when a DNC main in your zerg party might be useful, if you can stand the sound of Haste Samba making your ears bleed for those thirty seconds. Fully merited is 10% and functions as JA haste, but theres no clarity yet on if it's under the 25% JA haste cap or not (likely, but someone claimed it isn't), but for one-handers it doesn't matter anyway.
So 43.75% from magical.
Turban 5%, Homam H/L/F 9%, Swift 4%. If you're one-handing you might as well sh*tcan any hope for accuracy without feint, so you can lose rings for Blitz's. Wyvern earring with /DRG is still an uphill argument to make against dual wielding Republics, but still works and is unequivocal for Merc Kris or The Club or if you don't have a Suppa, 5%.
25% haste from gear.
So with 68.75%, 10% from Haste samba for 78.75%, just 1-2% from cap then. You lose a party slot but get your Hasso back.
So really, by adding DNC and Haste Samba, SE pried the gap a little further open between KClub zerg and 2-hander zerg again, assuming your LS actually has a 75 DNC...