If your doing ccts with these guys - a few approaches I used to use were-
Turn early crosswind, or request low level cct... To remain inside them
Second was a request for any of the following from tower -
Taf for nearby airport in the direction of ridiculous cct
Ask if sartime is required on this nav
Request vectors back to the field as you turn base
When you get to a normal spacing ask tower if the preceding traffic has turned as you've lost visual ( even when you can clearly see them)
Lastly confirm you are following xxxx aircraft as they appear to be departing for xxxx
Or a simple request to the aircraft wouldn't go a stray...
P.s Resume - I'm surprised you still don't use the tried and tested "inhibit" approach...