Swim. A lot. Remember, the squiffer has a lousy range, but can store a charge. Abuse this. Smoke out hiding enemys with autobombs, and finish them in one shot. If you know they're there, but they won't come out to play, store a charge and come around the corner and take the fight to them. If you have low ink, keep in mind if you let a charge show around the corner, then change into a squid, they may assume that you are coming. If you stay in place, it's their turn to play hide and seek, while you recover ink.