This build works very well for legendary solo and in a group of two.
If in a group of more than 2 consider swaping seeker mine damage for sticky bomb damage and use pulse or flame turret.
The measure of you sticky should be whether or not you can kill the healer with one shot. Always take out healer first. Use water consumable for extra 20% DTE.
With Inventive Back Pack just remember max damage is at full health.
Sticky can easily be swapped for flame turret or any other skill as needed as the mods are seeker mine damage.
The weapons are crafted from 204 blueprints, Any level 204 Assault Rifle will work but LVOAC stacks faster and does more damage than others.
Assault Rifles should be used as the EAD of the assault rifle contributes to the damage of the skills..
Primary gun is for damage and secondary is for shooting the mpc's if they get too close and for building stacks, Showstopper for this purpose is not recommended as there are only 2 usable talents and no EAD.
The secondary is also used to proc predatory. If you send out a seeker equip primary, after the seekers have detonated, quickly switch to secondary before the mpc's bleed out to proc predatory, switch back to primary for next skill use. Food consumable is useful for more benefit from Predatory and HOK.
For legendary mode missions bleed resistance is very important as in most missions you do not die from the damage of grenades but the bleed.
If you feel too much damage from grenades EDR on chest instead of EAD, the down side to this is less damage more mpc's still alive to kill you.
If you are doing the older missions where there are a limited number of elites then switch mods for gold 267 electronics - skill power mods with one stam - skill power mod.
If you can't stay alive or want more healing then use relentless backpack. It is a good idea to have both so you can switch out on the fly.
remember this is just a guide make it comfortable for you and your play style.... enjoy