If you are fishing during the day and deep with a spinnerbait the thing to do is to downsize your blades and use willowleaf blades. If you use a 1 to 1 1/2 oz bait and use two number 4 willowleaf blades you can move your bait at a pretty good pace and still keep bottom contact. When I'm fishing 15+ feet down I usually wind about 5 times with my reel and then let the bait drop to the bottom. You can crank really fast as long as you pause to let the bait hit the bottom you know you are near the strike zone, assuming the fish aren't suspended. Ranger Rob made me up some 1oz baits in Chart/white with a gold and silver # 4 willowleafs and I have caught some really good fish on them.
If you are fishing at night you really need to fish with a single colorado blade with a lot of "thump" or vibration and therefore you must go slower 'cause the colorado creates much more lift and so you must fish slower to stay in contact with the bottom.
I tend to play around with the blade configuration until I feel that I'm covering the depth range that I want to and can move at the pace that I need to. If I'm searching, I use a heavier bait with smaller blades and if I feel that I'm close to a bunch of fish I can slow down and use a lighter bait and can switch to colorado or indiana blades. Play with it and you'll see what I mean. It really helps to know someone that can pour you up a bunch of spinnerbait bodies and you add the swivels and clevuses and blades until the bait feels right to you for the depth range you are fishing. I used to have a buddy pour me up 1/4s, 3/8s, 1/2s, 5/8s, 3/4s, and 1oz baits and not even paint the heads and I caught just as many fish without paying a premium price. Once I figured out what I liked I told RR and he made me some pretty ones that might catch me a few more fish.