Whats the best approach to run a large load from multiple injectors? (Jenkins slaves)

I am using Jenkins to run my Gatling jobs and have a dedicated slave that is used as an Injector.
This Injector is almost maxing out its resources and I will soon have to use more injectors if I would like to increase my load.
What is the best approach to go about this? On the Gatling site it is suggested to either use Frontline or write a script that
does the splitting, running, collecting and analysing which I would prefer to avoid if possible.

The best solution for this is definitively FrontLine, our Enterprise product.