[2.5] Tornado Shot Champion Build: Where to go in Endgame?!

Hello everybody,

I'd like to introduce the built of my Tornado Shot range Champion and also ask for you advice, where to further progress during endgame. I am currently at level 79 and I'm running the following build:

Skilltree



Gear


My main attack is therefore

Tornado Shot + Greater Multiple Projectiles + Added Cold Damage + Faster Attacks + Life Gain on Hit

My Quasi-DoT is

Siege Ballista + Greater Multiple Projectiles + Added Cold Damage + Physical Projectile Attack Damage Support + Culling Strike

As Auras I use

Clarity and Fire Golem

Frenzy is a nice to have if I have the time to increase my damage output with charges.

-------

So far, so good. With the current build I'm rather happy even though I have to say I play pretty unprofessionally and mostly just for fun. But now I've come here to ask for you advice: For the last skill nodes I may use I have some ideas where to go but I can't really decide the way. My ideas are:

1. Deadly draw for Attack Speed and Damage
2. Heartseeker for Crit Damage and Chance
3. Master Fletcher for Damage
4. Armour Mastery for... well armour
5. Herbalism for life
6. Constitution for a lot of life but I would need to spend to skill points to even get there

So, these are my options or maybe you see something I totally have missed so far. All ideas and suggestions are welcome.