Burston is primarily 40% slash in its normal state and turns into exclusively heat in its Incarnon form. Phenmor meanwhile is 70% slash in its normal state and 57.4% slash in its Incarnon state. If you’re able to do so, a good recommendation for Nekros is to equip Amalgam Ripkas True Steel on a pair of Ripkas in your melee slot, as said mod allows for many (i.e the vast majority of) abilities and weapons that otherwise can’t dismember enemies to dismember them easily. Some ability/enemy combos get to the point where Desecrate actually has to play catch-up with the amount of body parts it needs to chew through (this is a good thing, though).

It’s not -needed-, frankly I haven’t found much of a need to focus super hard on dismembering with desecrate myself outside of dedicated loot scenarios when playing Nekros, but it is a very much appreciated added bonus and allows you true freedom in the weapons you wish to choose…so long as you’re willing to give up that melee slot, of course.