Are you gonna take the Distortion channel or you gonna put your DD pedal on the clean 'cause I have two setting....but I don't own the DD...
for the Distiortion Channel you can't really have the Pantera Tone but you can get near... I put the gain between 8-9-10 the treeble at 9-10 the mids at 1-2 the bass 9-10 the countour 6-7 set the reverb how you want it doesn't really change the tone to me but you have to put some and you set the level with the master to get it clear and loud
If you take the Clean Channel remember that Dime have a lot of Gain a lot of Bass but pratically no mids so ..
And for the slayer tone I don't really know seriously I'm not a big fan of them but they uses more mids and less bass... hopes it will help