Well, if you do that, you might not see any gains at the end of the cycle. But if they've already slowed down before you do it, then sure go ahead. Because more is more. And less is less.
When you drop your dose, or drop out a compound, you won't get the same rapid results as you did at that same dose on the way up, all other things being equal.
The way I look at it is like a ramp, and it should function that way. You go up, not down. So if I drop a compound I need to be adding one to replace it and increasing the dose of something else.
Usually I only drop compounds that are proving to be too harsh or have run their course as far as oral time limits. With shorter oral based cycles I tend to add and not subtract. For example:
20mg LGD 1-12
10-20mg YK11 6-12
10-20mg Superdrol 9-12
OR
20mg LGD 1-12
20mg YK11 3-6
10mg yk11 7-9
10mg SD 7-9
20mg SD 10-12
The second plan would be useful if trying to drop one out for another, and is usually the way I do that, to avoid having a peak of androgens in the middle.