The new Atomic Charge gets very good critics as an allround ball for medium oil or more around here - even from other manufacturers' staff players. Seems to be a strong ball, should be a good addition to your proposed arsenal. Only thing missing would be a real heavy oil ball - the Fear Factor should do the job, or a simpler Flash Flood.
But I am afraid that it will be difficult to find a heavy oil ball which makes a skid/snap move. An Ace might do, but you will need high revs and a length drilling to get the ball down the lane on dry boards to grip and make its move.
Otherwise you will get a rolling ball with an arcing move down the lane.
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DizzyFugu --- Reporting from Germany
"All that we see or seem, is but a dream within a dream..." - Edgar Allen Poe