I used to tank in VT for a while. DXXT and DVT are fun =D
Right now I actually tank for my 2nd box SK more often than the other way around because while my SK has similar hp and AC, I dont yet have maxed out defensive aa's or avoidance / dodge focus etc. I just load up a bunch of dots on whatever i want to tank,a nd then set my sk to pounding on it's back for dmg with melee + procs + panther. Works well enough for me !