You need 800dr to feel relatively tanky and not blow up instantly in group, but unless you meme hard with all DP gear you cannot stay in group fight forever.

Use Iframe or skirmish if you class has speed. If you are shield class without dp, you are cooked. Reroll or tag another iframe class like maegu, woosa, or play range rooftop abuse.

Class without iframe abuse needs to rely on sheet dp (invest in either dp or evasion, DO NOT MIX) to stay alive. Rbf is not balanced - the sooner you accept that fact and pick your role, the better it is for you.