My first, very (too much?) simple build. Feedback appreciated.

Hi all.

I discovered PoE recently, and I am quite hooked. :-)

After going all the way through merciless standard following a guide, I decided to start a new character making my own build.
So far lvl 55 on HC, I am quite happy with it for a self-made self-founded second character. Facetanked both Merveil and Vaal on cruel without even a sip of healing flask. Still, I am sure you big guys could give me a lot of helpful advice and small tweaks to improve!

Spirit of the build:
- Clearspeed doesn't matter. At all. I am new and I like to take my time exploring.
- No required unique. Has to be self founded (trade is a huge pain, especially on HC, and it is my first char so no treasure to draw from!).
- Survivability number one priority.
- High single target damage second priority (AOE doesn't matter, trash doesn't really hurt).

Weapon of choice: axe + shield

Skills at this point:

Main: Heavy Strike, Multistrike, Melee Physical Damage, Melee splash/Added Fire Damage/Life Leech. (last one swapped depending on circumstances, to be added together when I get more links)

4-link: Reckoning, Vengeance, Curse on Hit, Warlords Mark.

2-link: CWDT, Molten Shell.

4-link: Leap Slam, Fortify, Faster Attacks, Life leech/Added Fire Damage (swapped with main)

Others, not sure how to link/support them:
Herald of Ash
Determination
Fire Golem
Ancestral Warchief
Enduring Cry

Passive tree:

Right now (lvl 55):
http://poeplanner.com/AAQAAIURAABAe4zG2FhjPfyMz_ZIXz8UIO8OUEfkURo-8i98uCkufuJ5OcEEeWipbsAabzt34wHchNlHfr02ZU2-p5d5KCqLT2ebrj7GrsT2r6cczitQDc3-VAthr2xo8vAfogA8LYNfg8y3Pv4K2L3p1Z7N8pxul_e-0iHyQYIH2XwUcfjrZFIAAAAAAA==

Project for final tree:
http://poeplanner.com/AAQAAQkRAwCCe4zG2FhjPfyMz_ZIXz8UIO8OUEfkURo-8i9-4nk5l3koKotP6dWezacwAecUTfxLvJ8YkTboNZLYvf4K8kU64aZXTeP-jxpVYSGE72LstoovzMGChNlHfr02ZU2-p2ebQXT3TaLqEuGS0NrBdO0FLXrvQKDAvwSHj5kyTvJBggfZfBRx-OtkUsGj4mEwd1n-TjIX4Sb4E0yuUP5rE8llp64-xq4LYa9saPLwH6IABLPAZi5T02_E9q-nHM4rUA3N_lTqGHasz36tjTwtg1-DzLc-u-2RzpZsm1gx-zzvGF0b-iXftiykGdIhJJvynG6X974xnsABBsZdpN3VfXOtCfON9IMAAAAAAA==

Thanks for reading.
Any feedback/ideas/advice very welcome.

Rastakwer, recently exiled.