That's not enough stuff unless you're deadeye accurate lol.  The one thing I've noticed 7 weeks into my league is that Transitions come lightning quick.  And it's not always the best adjustment to make big moves with your feet and eyes.  Most of the time your adjustments will be slight footing adjustments and a ball change to something that's going to give you the shape you need down the lane.  We've only hit Chameleon/Cheetah/Scorpion so far.  Here's what I can say for those.

On Chameleon, I had a decent look on the fresh with a low r.g. pearlized ball that was pretty aggressive.  As the breakdown came, my adjustments would be moving a board or two right with my feet and eyes.  The ball change I went to would be a Sanded Shell resin and I found a great shot on the 2 and 3 board staying under the ball.  For the heavier handed players, they're adjustments came to a move inside 3rd-4th arrow with a polished assymetrical ball.  Breakpoint was around 10-11.

On Cheetah, my best look was the first came with a high polished reactive for the first game(which is usually pretty big) playing 7(at 15 feet) to 3 at the breakpoint.  After the oil pushed down, I would stay in the same zone and switch to a light/medium load particle ball with a light polish on it and throw it a bit harder in the same zone.  If I had to make a move, if any for the rest of the night, it would be using the same ball and making a hand adjustment to come dead up the back of the ball to cut down the angle on the backend.

Scorpion has been a problem for me so far.  We were 1 week in.  The first game I had a decent look playing straight up 12-13 with a low R.G. Reactive Solid, but halfway through that game we saw a bit of carrydown as there were a multitude of different shells going down the lanes in many different areas.  My next adjustment came with a move 4 boards right of that and a light load particle ball.  It was a good enough move to keep me around the headpin but not the right move to strike.  As they transitioned a bit more, all of my moves were going right.  The fill ball  of the 3rd game I took a gamble and took out a Med R.G./Med Diff Solid reactive and tried to play the 1 board.  As long as I fed the ball up 2-1 I got a huge move downlane that was like a homing device on the pocket from that angle.  I had a good last game with 7 strikes from that line, but that was due mostly to how we broke the pair down.  That shot definately wasn't there at the start of the session.

I would also check out bowl.com and watch the pro videos, they will tell you what to use and play based on your style.  It's really a help.  As far as the balls go, be ready for anything.  Out of these three patterns, I've already went through 9-10 balls looking for "that look".  Sometimes I've found it in a matter of 2-3 shots, sometimes I didn't find it until 3rd game.  The surface you're on is also going to dictate alot of the characteristics of the pattern as my Thursday night league seems to play these patterns a bit tighter down the lane in comparison to another house where I practice on these same patterns(Proanvils vs. HPLs).
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-DJ Marshall
...The Twelve In a Row Pro Shop

More important than covers, you need some different drills to combat these patterns.  I have had the best luck with pin more than 5-1/2" from my axis, either above or below my fingers.  This reduces the flare and let you get straighter which is EXTREMELY important when dealing with the tougher patterns.  If you know the patterns ahead of time, you can adjust the cover for the appropriate distance instead of drilling up several balls.
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Where is the bait?  I'm goin' to jail!!! - Chocolate GAYzer