implodinggoat wrote...
Since the OP likes accurate weapons I'd reccomend taking the Widow.
That's very good advice, and probably the best in this case.
But that's not my personal choice, nor is it the choice for everyone. I have many, many hours of practice with the Revenant,, having played this game on Insanity level since unlocking it after ME2 first came out -- before the Mattock was available. The Revenant's reputation as a rookie "spray and pray" gun is understandable, since it can be used that way. However, using it that way is misusing it.
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People say that the secret to using the Revenant is to fire short bursts. That's almost right.
The real secret to using the Revenant effectively is to fire it in TWO-round bursts or even ONE round shots. You'll look a telegraph operator tapping a key before you're able to do that. (I don't know if this is easier to do on a PC with a good gaming mouse, which is my rig.) This makes the gun quite controllable.
The Revenant's aiming reticule is "spacy," but putting the imaginary crosshairs where they need to be doesn't take all that much practice. Headshots really aren't a problem with practice, at least not at ranges in which you would't be at leisure to use a sniper rifle anyway.
The difference is, when something pops up at short range, or is a tough target or a swarm of husks is your problem, the "firehose" option's always available. Even in relatively short bursts, the Revenant is devestating.
It saves Heavy Weapons ammo, because you'll hardly ever need a heavy weapon. That's the long and short of it.
I also admit to the non-rational satisfaction of hearing a Krogan say "Try a real man's weapon" just before giving him a face full of Inferno ammo at close range.
One of the Mattock's big pluses is that it can trigger special ammunition effects like fire panic pretty easily. That's a valid consideration. And even I still prefer the Mattock on some missions such as the Batarians at the missile base. They are relatively easy-to-kill targets but there are a lot of them. Pop out with a Mattock, kill one or two with a few of those potent rounds and repeat.
My fighting style probably plays a big factor too. I like to set my squadmates behind cover and then use adrenaline rush -- not to shoot, but to run and flank. I especially like Garrus and Zaheed as a team, armed with Incisors, while I get in close and to one side. Garrus strips shields with overload. Zaeed strips armor with inferno grenade, and both strip barriers with concussive shot. Shep tears up whats left. Most players, I get the impression, prefer to do their own sniping.