I don't like these deterministic recommendations ... There is more software around than just Adobe stuff ... (Affinity, Capture One, Open Source programs and many more ...)
Yes, there are lots of adequate software apps and good results can be obtained using different apps. It is also fair to say that there are dominant professional choice apps for good reason and there are some advantages to using the same tools that are most popular and most used.
What we do have that is deterministic are basic editing principles and practices that should be considered since they apply regardless of the specific software apps but should inform the choice of app type and usage.
For example you can have your camera save a raw file and/or a processed RGB file as an original. In almost all cases when the camera saves a RGB file it will save a JPEG and all camera JPEGs are lossy compressed. If you edit a lossy compressed RGB image and make changes to the tone/color you will cause irreparable damage as the changes you make interact with the compression grid. Many people chose to do exactly that tolerant or oblivious to the damage. It's OK if they understand the parameters of their choice, but many do not.
Photo processing apps come in two fundamentally different structural types: 1. Raster editors and 2. Parametric editors*. Choosing one or the other is in part determined by the structure of the file you are editing, for example raw files require a parametric editor to convert them to RGB images. In many cases an RGB image can be edited by either type of editor. The type of editor you use effects how you work and the results you can achieve. For example you noted earlier in this thread the issue of non-destructive editing. It is a deal breaker for some and for good reason. Both parametric and raster editors can work non-destructively but with limitations. The tendency is for parametric editors to be 100% non-destructive while most raster editors are only partially non-destructive. It's no big deal for an enthusiast/hobbyist to want or need to make a change to an edit and find they have to re-do an otherwise unrelated aspect of the edit. It can be a huge deal if a Pro encounters a similar situation (maybe a client request) and the number of photos is in the hundreds.
Raster editors dramatically increase your disk storage requirement -- by as much as 80%. They also increase file management complexity. Both issues compound with larger numbers of photos.
Most amateur photographers don't have a clear understanding of these types of concerns. The OP started this thread stating he uses RT and wants to consider what additional raster editing app would be a good choice for further edits. RT is a parametric editor. RT's editing is 100% non-destructive. If you begin an edit in a parametric editor and then continue to edit in a raster editor odds are you're giving up the option for your editing to remain 100% non-destructive. Adding the raster editor kicks in the extra disk storage and kicks out the ability to edit non-destructively.
That begs a question not often enough considered; can we keep the editing parametric and avoid the extra disk storage and loss of non-destructive editing?
These issues apply universally regardless of specific software apps.
*There are a few crossovers.