I used authentik first as it was suggested by a friend with whom we are sharing the vps, and so I kept using that also for another personal vps.

It is a good combination of robustness and flexibility for me, plus we needed a user dashboard or at least a list of apps. Custom workflows, blueprints and stuff were a bit of a pain to understand, so I just copy them between the two install I have because I keep forgetting how everything works. It's also quite resource-heavy, so I might try something different in the future.