effect control by channel

What I would like to do is set a group of moving heads to effect 901 or circle or a relative effect I have made, then tell chan.45 (one of the units in the group)  to be smaller to avoid set or orchestra, or faster. Then record this in a cue.

I'm quite new to this desk (ION 1.8) and hope I don't need to make ch45 it's own effect.

Can I use descrete control for this?

I have seen rate change of effects per cue but nothing about attributes per chan.

I know the desinger I will be plotting for in two months will want this effect (on a new desk) so I'm trying to forsee the bad moments. It won't be just one extra effect, each head will need its own effect any time we do "movement".