This is full skillpower Tact Build.
Build: I have used 5 piece tact not 6 piece as 6th piece bonus is just meh couz as a tact player you are better off spamming those skills not wait for to build stacks and use skills in succession. So with inventive backpack you are getting that additional 15% skillpower when having full health so you need to understand the positioning of where to take cover as not to attract aggro and take no damage at all. Enemy Armor Damage is rolled in vest and gloves to give extra damage. I have used Damage to elites mods not Skill-haste or Skill-power mods couz without any skill-haste mods you are getting 45% skill-haste from set effects from tactician and skill-haste rolls in vest, gloves and hoster, as skillhaste is capped at 50% there is no point of using any skill-haste mods. And in terms of skill-power yeah you can use that but extra 3.3k skillpower on each mod is not that good as having 4% additional Damage to elites from each DTE mods. FYI Damage To Elites and Enemy Armor Damage also works on skills.
Primary Weapon: The LVOA-C i use is lower gear-scored one (204 gs) which can be obtained from random drops (in world tier 3) or you can get its blueprint from blueprint vendor . As 204 scored weapon the talent requirement is lower and can get use from Ferocious and Destructive while just equiping it and when you kill the enemy you get benefit from Determined.Disclaimer: This weapon is not for doing damage this is just for unlocking talents to do extra damage from skills.
Secondary Weapon: I have used M700 Carbon as secondary for long range use when you can't reach that far with your skills or this is here to take care of that annoying sniper far ahead as your skills can't reach him/her. As for talents it is basic for any skill power build having compitnet for 10% damage for 10 seconds after using skills , Talented for extra 15% skill power after you kill an enemy for 20 seconds and coolheaded for decreasing the skill cooldown.
Sidearm: This is for when you need little healing over time with preadatory to keep using inventive backpack for more skillpower even after you got shot at .
Skills: As tact we are trying for doing damage without going out of cover to use that inventive backpack so i prefer to use seeker damage performance mods. In terms of using BFB its little situational, if you want to attract aggro then go for Pulse turret and it also helps to stack up skillpower without going out of cover to shoot BFB. Use BFB if your teammates can handle the aggro and there is gurantee the you won't get shot at!
Playstyle: Equip LVOA then only use skills, by dong this you can get 3M Armor Damage with BFB and 1.2M without armor, 160k bleed per tick by seekers on armor and 118k bleed per tick without armor.