I use my Eraser Banshee as a medium-light oil ball.
Jolts are a bit stronger in my opinion.
Of the existing reactive balls in Storm's line up the Tropical is the best 'dry lane' ball. However, be careful to lay out the Tropical right as the core and cover can create a relatively strong flip ball with certain layouts.
Get a Tropical and drill it about 4 1/2 X 4 1/2... That should work.