For push processing +1F add 30 seconds for the C41 developer.
For cross processing you can keep the standard times. Only some E6 films you have to expose a bit different.
Rollei C41 digibase works very well. I made the replacement for Amaloco K54 (mono-negacolor) which is not produced anymore. The orange mask in K54 was pretty strong so which is less in Digibase C41. It seems to be that the seperate components can be kept for some years. Component C is then the most critical part of the C41 developer.