How am I doing?

Just looking for input/constructive criticism of my Marauder build, mainly the skilltree. I'm running a One Handed Mace with a pure Armour Shield, and pure Armour defensive gear. I use Heavy Strike for single-target damage and Ground Slam for AoE.

Tree: http://www.pathofexile.com/passive-skill-tree/AAAAAgEAFCAaPhznHpQhNCgqKS49_EE_UEdR5lhjXz9qHmo7dn92rHk5e4x8uH7gfuKCB4TEhVKLT4zPl3mbap5XrY20L8RYxtjPftIh2WHZfORR6dXqGO8O8azyL_JB9kg=