| I maxed singularity on Liara and I used her on every mission. It was awesome. I played a Vanguard and frankly, I barely used bionics at all. I just pistoled everything to death. If shit charged, Liara fired a singularity and everything that got caught in it just floats around in the air and you just shoot it down. It was the best anti-charge thing ever.
The only time I ever used barrier or shield recharge was on the last boss, and I used it more out of laziness. I got sick of strafing so I just hit them both up, hit up marksman and opened fire. When they went down, used adrenaline rush and did it all over again.
In fact it was really only the last boss that I used most of my abilities. I was pretty mean to my crew. I just sent them in as decoys and killed shit with my pistol. When they died, I used Unity, healed them to full, and by that point nothing was alive. Playing Hardcore now so I'm prob going to have to work on my skills a bit =P
I finished the main campaign at 27 hours, 56 mins. I believe I did every quest. Instead of continuing at 50, I rerolled as an inflitrator because I'm not happy with Vanguard. | 