The best tip for that and what a lot of the super killwhores that post huge killcount games on YouTube do...
Learn the spawns. Where spawn points flip to once their last spawn point is now too close to danger.
Domination is easy. They should spawn near the flag(s) they control. General rule of thumb is to not follow your team and go where all the green arrows are. Sure there's action there, but by the time you get there, your team either wiped them out or got overrun and you're headed into a stacked fight. Either way, don't go there. Figure that the respawns will be happening away from the bulk of your team, so that's where you wanna be. This is where running the Assasin perk pays off since if they have a UAV and they respawn way the hell on the other side of the map from where they just died, and see no red dots near them, they think they're safe and do dumb shit...like sprinting back to the action and not checking corners. Meanwhile, you were already there to head them off. Take advantage of their haphazard ways by killing them as they are sprinting around a corner.
But yeah, learning/predicting where they respawn is a huge advantage. You know it's like playing Drop Zone. There's a pattern of where the zone shifts to on each map. Once you know it, you get a huge advantage. If there's only 5 seconds left till the zone moves and you respawned across the map, make a break for where the new zone will be. Start racking up points and earn the first care package because you were already in the new zone as soon as it shifted there. Plus it gives you time to do shit like set up a trophy system and find a good defensive spot to kill the enemies as they try to take over the zone.