where do you play? if its a walk-on where electro's are the normal opposition or on a sup air field probably not. Pump's fun to play and makes you think more but you'll still get lit up when you get something like an ego shooting at you. I'm not saying don't get a pump, just don't sell the gun you normally use to get one (unless you hate the mini!)
I've not used a mini so I don't know how good the eyes are but if they are decent and you want to learn not to just spray paint, snap shoot and move more etc try slapping a gravity hopper on it maybe. That's mainly what I learned to do using a pump - but a £3 hopper's cheaper!