Well you read the title. I’ve been wrecked by sparks so many times, Revivr does a ton of damage and I wanted to practice with it. On the other hand, Nader seems fun too. I come from tf2 where I mained demo, nader looks very rewarding when you get your shots on target. I also wanted a powerful smg merc. Both of them have some skill ceiling in learning how to aim with their special weapons.
Can you guys please give your opinions and what you know about the following mercs to help me decide? Thanks.

