[Taera]

Tractor beams are the more strategical weapons. For most weapons, enemy that is closer will receive more damage (this including PPB & APB) and would be especialy powerful when used with Graviton Hellbore.
Repulser beams are universal weapon. First the fleet breaking mentioned before. Another two uses mght be to shoot the enemy and put it away. Especialy powerful when you're in advantage of speed because a Large mount repulsor could realy pull it away so it'll have to go towards you long way. then your move, and you can go point blank and shoot, and then push it away again.

But the more useful way is to add repulser weaponS (stress on the multiple) on your heavy load ships. WMG could be the perfect example - BB with several WMGs and repulsers would break havoc in enemy lines. Shoot them, and push them away (heavy mount repulsers are realy great at doing so).

Two things to mention:
1. Someone explain me the use of heavier-than-normal tractor beams?
2. It is important to mention that tractor/repulser weapons DO_NOT work on ships with greater tonnage than the attacker