Let's talk Eldritch Warlock

Brainstorming here.

Your merc probably has might aura and wields Pride.

You saw everyone flock to Breath of the Dying

Thunder Maul (big number go bigger).
Then everyone was like we should all go for Doom instead (freeze + crit + 2 skills). Also in

Thunder Maul.

Now then the above needs to get all the FCR it can get to reach 75 FCR.
People realized Fortitude might be ok instead with 25 base fcr and damage still big enough to stomp in p8. But wait, you are spending mana like a choo-choo train on steroids.

Correct me, if I'm wrong, but is the BiS actually ye olde Insight? 35 FCR, whoppping +6 crit which gets upped by all + All skills gear and solves any and all mana problems.
For your bound demon, cursed is a no-brainer,

Fanaticism helps your merc and gives you 118% off-weapon ED.

Did we go in a circle in terms of rarity of the weapon only for bagholders to hold their own bags? Sell into the feeding frenzy is my take. Buy Insight.

My warlock is currently level 42 rocking an

Eth.

Halberd Insight 17/249/4 that I use to put on merc when leveling new chars.

Skill points not optimal, spent all in demon tree before level 25, no respec yet, but now have 1.4k damage with 2 echoes and he obliterates everything

Can you imagine

Eth. CV Insight becoming BIS mainhand weapon? What a time to be alive