How to Tank ranked PvP?

[Mirch]

How does one avoid getting vuln stacks? What causes them? I dont remember getting anything like that in 8v8.. wait, you mean the debuff you get for holding medals?? If thats the case then i get what you mean. I had forgotten about that to be honest..

In either 8v8 or 4v4 Feast mode there is a medal system.
Each player at the beginning of the match has 100 medals, if they die they drop HALF the current medals they have, if the enemy team doesnt pick medals on the ground within 1 minute (i think), those medals go back to the owner.
A match ends if a team collects half or more of enemy team medals: 600 in 4v4 (400 initial medals per team), 1200 in 8v8 (800 initial medals per team); or when match ends the team with more medal wins; or when there is sudden death, the first team to get a kill and get medals win.

you get a debuff based on how many medals you have currently, this debuff increases the damage taken, more medals you have and more vulnerable you are, debuff stacks from 1 to 10.
ideally tanks would get 2 stacks, healers 1, melee 1, ranged 1 or make melee 2 aswell, but this depends on match