Need advice for marauder double strike build

Hey guys! So i recently started playing poe!

My first char is this marauder (atm lvl 71 in a4 merc), i tried my first maps but a few packs just oneshot me...

this is my gear atm




this is my passive tree:
doublestrike

i currently have a bit above 3k health, max res, 7-8k armor and buffed 57k dmg with double strike.

i kinda feel like my health pool is really low, although im not sure what to swap out first as id like to keep the max res!

could you maybe help me out and tell me which items should be swapped out first? please bear in mind that im rather poor :S

thanks in advance for your help guys!

3K HP with Abyssus is plain suicidal as a melee build, you want at least 7k+ HP. Use Deidbell for the time being.

As a Berserker you obviously want Cloaked in Savagery and Vaal Pact for instant healing.

ok thanks for your help, but how would am i supposed to get that much more hp? change my passives? or just farm until i can afford items with more str/maxhp?

edit: i just got myself a deidbell, will try out soon!

Yes, you will have to adkust your tree as well to increase your health pool. Also consider the new Lycosidae shield (hits cannot be evaded), this way you'll have 100% chance to to hit.