Without knowing the detail of what you're doing, Dan, it sounds like you may be going over to these plug-ins a little early in the editing process. Generally one tries to get as much done in LR, and then use other programs for things they do better (though there are opposite approaches such as Michael outlines for processing his PhaseOne raws in CaptureOne and then using LR for the resulting tifs). Perhaps have a think about what you're doing and when and see if you can eliminate some of the back and forth steps? Also, don't overrate the history - you can wipe it and your pictures will still have all their edits.