I do things like:

  - nest tmuxes (up to three levels, with different prefix keys for each level)
  - one tmux session per workspace (git clone, whatever)
  - cscope on window zero of any workspace session
  - use a CSCOPE_EDITOR that starts $EDITOR in a new, appropriately named tmux window in the same session, and returns control to cscope
  - script the setup of my main session