The best bet for rapid cabin cooling is leaving the bleed air switches off until line up. With the ECS on man cool or auto. As mentioned the bleed switches just introduce hot air into the system. A good right to left scan when doing the hot five will switch them on.
Vice versa on a cold day. Get the bleeds on ASAP.
Leaving the bleed switch in low may have a small effect. But it's meant purely for performance. And as soon as the bleeds are on the hot air is running round anyway.
As an aside I've seen all sorts of "personal techniques". All terrifying in their ability to go wrong. The top two are leaving the bleeds off until passing cabin cruise altitude and operating on one bleed only. Horrendous!!
Not a problem in the 90!