Lvl 78 Ground slam marauder needs help

I've been following the noob guide on this forum Since level one. Now I'm lvl 78 and i seem to be doing less dps than other classes and i seem to die much easier than everyone else. Even though i maintain my endurance charges up.

If anyone wants to inspect me and try to help i would appreciate.

Here are my items:



And here is my tree:
http://www.pathofexile.com/passive-skill-tree/AAAAAgEAAnEEswUtDjwOrQ_MEuEUIBRNFHEY2xkuGjgc5yDwIWAn7Si1KS4ppS3SMgk6UjrYPfxAoEE_Q5xE503YUEdQUFHmVElVqVYEVw1YY1nzXz9gS2CIYVJqHmo7cql07XTxdud673uMfLh82YFvgziGYIx2jM-QVZHOl7SePJ65ns2fPp_LogCi6qZkpzCnhKgYqWisqqy6tC-53bvtwBrG2MmY0iHZYd7B37_kredS7DjvDu9O8B_yL_Pd9kj3vg==

Thanks in advance.

You need much more survivability. When you feel you don't die as much, then when you level up start putting more points into mace passives. And get a better weapon, this one is NOT sufficient for a level 76.

http://www.pathofexile.com/passive-skill-tree/AAAAAgEAAnEEswUtDjwOrRLhFCAUTRRxGNsZLho4IWAn7Si1KS4ppS3SMgk6UjrYPfxAoEOcTdhQR1BQVElVqVYEVw1YY1nzXz9gS2CIYVJyqXTtdPF253rve4x8uHzZgW-GYIx2jM-QVZHOl7SePJ65ns2fPp_LogCi6qcwp4SpaKyqrLq53bvtwBrG2NIh2WHewd-_5K3nUuw47w7vTvAf8i_z3fZI977Uj1uv3Q38xWegh3ZKfcRYJ9VmnvrSNunjag==