I've fiddled with your rotation a little bit more.. and I think you can bait twice with 18 CP without using Observe. But you do end up losing 10 durability.
It goes like this.
CZ -> IQ -> SH2 -> PbP -> PbP -> RS -> RS -> then onto the quality work.
You save 32 CP here and a cross class slot from not needing Ingen 2. If you fail, or more than 1 ToTT pops, you could always push the RS over to next SH2 so it's pretty flexible.
Then the finisher.
SH -> GS -> Innov -> CS2 -> Byregots -> CS2.
You do end up using 10 more dura for synthesis step but considering the 32 CP you save from not using Ingen 2 and 14 less CP for 2 baits.. 46 CP has to be more than enough to cover 10 durability loss.
It does look like you need around 420 Craftsmanship.. which would depend on whether you're doing the manual before or AFTER your supra.. I don't like to invest in my off hands before Supra.. But I guess it could work for some people Craftsmanship req can be lowered to about 400 by using 1 standard synthesis for 15 CP under SH as a finisher..
If I'd thought about the rotation I just mentioned before getting all my books, I think I would've certainly used it, but for a guide, it makes things way more complicated.. I have mixed feelings about it.