dark, unfortunately +skill does not effect normal melee accuracy, only pact accuracy, as per the patch notes. so, while not denying that these are a great alternative to marduk, these are still at best a macro piece for siphon or magic pacts, while af+1 legs should be main slotted.
These pants could possibly replace evoker's, or summoner pants. But imo, all three pants are situational. I would defiantly macro these in for elemental siphon, and my HMP macro. I contemplate if i would let my avatar melee in these pants or not. Great alternative to Marduk Pants for summoner.
Full-time is only useful for looking sexy, Evoker's are much better, though with the June 2010 update even those are outdated compared to the Perp-1 pants.