[Titan Weapon Tank - primary power?]

I would give Electric Armor a shot. You can eventually ignore Endurance Drain entirely, you also get some recharge in the form of Lightning Reflexes, and Energize will also reduce the cost of your endurance powers for half a minute. Power Sink is perfect for getting back any lost endurance since Titan Weapons eat a lot of endurance. Plus you have the resistance to recharge debuffs and psi resistance too. Edit: When I say you can eventually ignore Endurance Drain entirely, I mean by level 8. By then Grounded and Static Shield will offer a combined 110% or so resistance to Endurance Drain, never fear those Elec blast mobs/Sappers again.

[Issues with Mission Architect Experience/Influence]

Since the reboot, AE has been giving significantly less influence. Prior to the move, a +4 boss was giving about 211k inf (on Indom without the 50% exp boost) with exp turned off. Since the move, the same boss is giving 89,713 inf.

 

Turning on exp gives 64,801 inf for the same boss, meaning turning exp off only gives about 38% extra inf rather than the 100% extra we should be receiving.

 

The Windfall temporary power is having similar issues. With Windfall, the +4 boss is giving 76,897 inf (an 18% boost). With Windfall and exp off, the boss is giving 89,713 (0% boost).

 

I don't recall seeing anything in the patch notes about additional AE nerfs beyond the original -50% that was put in place and based on the inconsistency of the inf boost with exp on/off, I'm assuming there's some issue with it.

Reducing the experience granted by AE may very well have also impacted the inf gained by AE, experience and Inf gains are tied to each other in ratios based off of enemy rank in the base game.

[Pets don't seem to be enhanced]

i think you were right the first time. My default assault bot did 40 damage with its plasma bolt, then the same damage after a 50% damage increase through enhancements.

So, when you slotted the enhancement in, did you dismiss and resummon the Assault Bot? New enhancements only take effect if the pets were spawned in again.