Lightning Strike 1h Sword/Shield Build [HC] - Suggestions?

I currently play a Ranger at Lvl. 63 in Hardcore and I'm unsure where to go from now. My current build is as follow:
My gear is pretty mediocre and it's pretty tough to survive in Act2 on merciless because Mobs hit really, really hard.

HP: 2310
Armour: 2555
Resist: about 55% to cold, fire and lightning (except -60% Chaos atm.)

I use Viper strike and Bear Trap for single target kiting and Lightning Strike to AoE. Farming Fellshrine is no problem whatsoever but i drop pretty hard vs. some elites. Now my question is: What would be the optimal way to progress in the passive tree.

Should i respec my 9 points from the Duelist part and go straight to the Marauder side for:

+100 Strenght
+15% All resist
+30 max. Life
+30% reduced Extra Damage from crits
+37% Life
+1.9% L/s
+5% to all elements
__________
19 Points

This means 10 extra points for:
+60 Strenght
+13% Life
+0.9% L/s
+5% to all elements
-18% phys. Dmg
-3% attk. speed
-20 Dex

This would be the build:

Another approach would be to keep my duelist points and go for the middle section instead.

For 13 Points i gain:

+60 Strenght
+56% Life
+Iron Grip
+the stats from the duelist part
__________
22 Points (9 points from duelist included)


So is the Duelist section even worth it or should i go for Marauder nodes and the middle part (+Iron Grip) afterwards? Maybe additional Armor and Sword nodes in the late endgame? I'm interested in your opinions about this.