Good overview of roller play do's and don'ts! Could use a bit more in depth examples of how to ambush people. Also, I don't agree with damage up being useless - it's super good for the carbon roller I find, both to increase the range at which you can splat, and for the burst bombs.
But i don't think that the dmg up help you very much, as the carbon roller typically kill on 2 flicks anyway. You have to be pretty far away to not kill in 2 flicks. And if you are so, you're much better off to pick a different fight, or find another angle to attack from.
And for the splatbombs. They doesn't change the amount of splatbombs it takes to kill an enemy. It might amp up the splash dmg, but i find many other abilities to be much more usefull.