BR is the best overall scoped rifle. PP comes in handy against vehicles and CQC (You can hear the Bolt Shot, so I avoid it) Grenade comes in handy against vehicles and for last ditch "kills from the grave" Thruster can be the most effective way of escaping and throwing off the enemy resupply is helpful because every player that has died is very likely to be carrying grenades great for multi kills and defending against waves of enemies (i.e. defending the flag)
Well perhaps in big team/dominion plasma nades are more effective. But frag nades are better for anything without vehicles because bouncy bouncy round corners.
I can see that and definitely agree, but I'm talking about best all around, which means the most helpful in all situations/game types (excluding obvious games where it won't help like Flood, Griffball, Action Sack ,etc)