Snap shooting is your main tool, you need to get your snap as good as it can go, i've found the joy technique the best for this, but you might prefer something else. Whatever it is, you need to be quick and you need to be accurate. As far as accuracy goes, you need to play games with your marker to know where it's going to shoot. The myth that pumps shoot more accurately only exists because the pump players learn where their shots are going to land more than semi players typically, there's very little difference between the markers accuracy wise.
You'll find in pump vs. pump games that you can afford to move much more, this means you can try out different bunkers and still have a "get out" option if the one you move to is useless but in the same situation, it's hard to shoot yourself out of a tight spot quickly and accurately so get to know your field's 30 and 40 bunkers really well.
If you end up playing vs electro players you need to get some patience. With a more observant team it's hard, but most electro players will not be looking at you all the time, they need to reload and look cool
so wait for the stream to stop and start snapping.
Mostly everything else from electro playing is applicable to pump play really.
Above all have fun!
