So as a Paragon traditionalist, if you're going to be using the assets of Paragon I feel like you should try to do your best by tackling what made Paragon so great before adding your own flair (That's not to say don't add your own flair but make sure it plays like Paragon before you branch off)
Overprime has my gratitude for giving us a free half-baked playable game months before anyone else just so we could have something to play, even if it was a buggy mess. Predecessor has a higher overall degree of polish. Predecessor felt better than Overprime last I played it, but honestly they're pretty close. The more people who hop on the shorter queue times will get. They have hosted servers and matchmaking.
Which one is best? If you want to play Paragon today, go to and download it (ideally from the Google Drive link because it's a little less tedious).
I played Paragon way back when it was in Closed Beta and paid for the Founder's, I enjoyed the game so much and only stopped really playing it when they released the latest patch before it closed where they revamped the card system and personally for me ruined the game.