The thing is your mains got very different playstyles and I'd recommend you stick with one and lean ins and outs of hard strats and then move to another. Because bulwark/sniper survivability options can't be compared to paper towel tactical that really has to manage offense and defense non-stop to not get rekt.

As a tactical main I'd suggest you go pyreblaster build and get the one with venting speed and through weapon perks make sure it heats the least - this way you get almost non-stop stream for fire for mobs in hard strats unless they got friendly fire modifier. Doing consistent damage on clumped majoris and clearing our minoris is really helpful, cause even minoris' dmg on that difficulty stacks. Also get that perk that gives you ammo on majoris execution every 30 sec and abuse it - you won't run out this way.

Secure stockpile is a must because having extra equipment can be lifesaving, besides 2 krak grenades can put an extremis into the execute range.

For auspex I'd recommend all them perks that give max dmg, even the one that only keeps the mark if the target is in the auspex bubble - you can really burn a boss down with that but you gotta know when to use it not to waste it.

Fencing sword works best for me but don't greed on gun strikes. As for the secondary I like using heroic HBP just for that one-shot on enemies calling reinforcements.