Optimize playstyle. 87s bread and butter is cqc, if you’re good at hipfiring you’ll be unstoppable. Try to let your team do the mission work and act as a guard so when a dumbass pred rushes one, you swoop in and second wind them in seconds.
25 is all around best class though considering the specs, he’s quality in any situation but falls short with optimized builds, which everyone’s got a few of. No reason not to run him if you’re comfortable with it.

