so it took me a while to pin down what was causing it, but pretty consistently when i use summon wraith with locus of resurrection (wraiths are summoned at cursor location instead of in front of you) to summon them in a location well outside of my minion pathing range (usually up or down a cliff) i get severe lag in the form of my character stutter stepping and down right not moving while my minion chain rubber band trying to engage the enemies my wraiths are fighting before smacking the edge of their pathing range.
what tipped me off was that the problem always fixed itself if:
A: i got in pathing range of the wraiths
B: the wraiths killed all enemies near themselves then began traveling to me.
C: the wraiths timed out.