Need help with updating my build

Hi all.
I didnt play POE for quite some time (maybe a year). I see a lot has changed and im realy lost. I have just one charachter (marauder) and im not willing to create any more. I created newbie friendly ground slam when i started playing. Now i changed to sunder and made my passives tree like in juggernout build (posted).

Can u please look at ma character and tell me what to change in passive tree and items? I will be very grateful. I want to enjoy POE again but i need to make the char strong again. I dont count on having 1 milion DPS but i have around 100k now and its not enough. Ive seen there is a earthwuake build with around 800 k. That amout would be fine. Look at my jewels (second tab and passive tree). Maybe i should cancel some skills in the tree and change it to gain some jewels.

Please consider that i dont want (dont have enough time/currency) for complete revolution in items. Please try upgrading my char using my stuff first.

Thank you all for any help.

bump
anyone?