1- Take a gladius to talon, it will rise for sure in December, then upgrade the nomad with that, gladius always available
2- Then, some DUR to vulture, wait for price raise too, DUR always available
3- i think you still have MSR CCU? so you can use one
4a- If going for a 600i : you can get a C2 CCU (like Gemini to C2 or Mole to C2), C2 will probably be released in December ot Q1 2021, so price raise. Mole always available, Gemini not always
4b- For a 600i explo : then you can use the Mole to BMM CCU you got from me if you havent used it, Mole always available
You will probably save 165-180$ like that for a 600i explo, and around 90-100$ for a 600i
It is a game of patience since some ships for the upgrade path are not yet released.
Not talking about warbond CCU here, just credits ones. You can have more option with warbond i guess.