For tech I think the Angaran armor beats out Heleus. I'm using rank 6 items, and although I have researched the Heleus gear I have not yet crafted any. Great for power damage, but the Angaran basically matches it for tech damage.
Rank 6 Heleus = 34% power damage, 12% weapon damage, 22 Damage Resistance.
Rank 6 Angaran = 33% tech damage, 33% tech duration, 35% shields, 21% tech construct damage.
Heleus is obviously great for those who want to switch between combat, tech and biotic with profiles. No other armor benefits everything across the board. Less spots for augmentations with Heleus as well, can close the gap by getting 8 extra DR on another armor set (or whatever you want with 4 aug slots).
I have not used it yet but the Remnant armor is also interesting. It focuses more on health/shield regen and delay reduction instead of a flat out boost to health/shields/DR. That is easy to dismiss but in actual use I'll bet the Remnant armor does more for survivability than straight up boosts to health or shields or DR.
Having done all the other games on Insanity, and knowing what this game is like so far, I'd wager that the health and shield bonuses will far outstrip the other benefits provided by other armors. Frankly, I've never really cared that much about armor bonuses in these games anyway. I've been able to clear them all wearing whatever gear I thought looked the coolest at the time. Weapon, skill and companion choices made far more difference than anything I ever did with armor.