The only thing that really annoy me isn't so much about the engineer, but the fact that most Heavy Pistols in general are heavier than SMG's and some Snipers. I like having a high Bonus Recharge Speed AND having a gun that can do some damage as well, which cuts it down to just one gun.. Mostly Sniper in my case.
Carnifex and especially Paladin are basically sniper rifles when fully upgraded. They weigh way less than that Widow or Black Widow and pack some serious punch. Can't have everything, which is a good thing I guess.
So, I've been playing the game through on Insanity, and it's by far the easiest of the three. Playing a vangaurd with minimal weapon load (Disciple shotgun and Vindicator assault rifle), my powers cool down so fast that I can essentially afford to charge nonstop until the battle ends. The only enemies that give me trouble are phantoms - even the fight against two banshees in the Ardat Yakshi monastery was easily handled with charge -> roll away -> empty shotgun clip -> reload -> repeat.
In SP where lag is not a factor, I've found the Graal is amazing. Charge the gun -> release the shot -> Charge yourself -> unload a second blast right after coming out of the Charge. With projectile delay you'll be landing 3 attacks with next to no delay which is enough to bring down protected mobs instantly. It's also pretty accurate over long distances so you don't need a backup gun. The downside is it's fairly heavy.
As for the ninjas, have Liara or Kaidan prime them, storm to Nova -> Charge -> shotgun blast to the face. I find enemies that can't be staggered such as Cerberus turrets much more troublesome. Those are responsible for like ~90% of my deaths or something.
Been trying some Gold matches lately, branch out a bit from the Asari Adept biotic bomb spam on FBW/G. PuGs are generally terrible. Doesn't help that my gear -and skill- isn't up to snuff and can't carry the team myself. :/
Edited by 213374U, 28 April 2012 - 11:42 PM.