wait for CCBD F150 to be added and you will see OP fighters that doesn't die from one hit.
No need to wait for that.
Even in this cap 70 with full con and props, fighter is hard to kill.
I test this many time with fighters back in POB and now that props are back to 1, their def, base dmg is high and they have tons of HP soo they don't give af about life steal and curse.
To fight those fighters you need to use anti critic gloves, legendary jacket pdef with anti critic, sure you will lose tons of focus and pray that you hit them with bold but there is hit rate reduce debuff making your bold mostly useless since it miss and if it hits, bleed dmg is low and with 50% reduce bleed neck, dmg ain't high.
All in all, everyone can be really hard to kill if they know what they are doing, they are using KD skills too, stuns and if their needle critic and for sure sometime it will, it is one critic.
I really loved the fact when I face dex fighters, since they have soo low HP that even with auto pots and potions, are ok to handle until one shot happens, well it happen xD.
All in all, with EchoSon suggestions, most of them are good that would improve fighter but still even without it, fighters are alright.