Hi Cacharrada,
Your rack looks quite complete, a bit small but as you said you would buy a bigger case, so then that's fine and keep then at least one row space free for future extension.
I don't know the Pamela's New Work Out, so can't help you on that one. I am using a clock module (Make Noise - Tempi) and using that in combination with the Shakmat Modular - Time Wizard, that's a clock multiplier/divider with some logic options, I feel theses two combined is a nice combination. I can imagine however that the Erica Synths - Black VC Clock v2 works well too with any other suitable clock divider module; actually... I consider the Black VC Clock v2 myself for the future. Sometimes it's nice to just have the BPM value that the Tempi can't provide.
My advice is to start your above rack without the Vermona - meloDicer and the Make Noise - Maths. Waiting with the latter one shouldn't be a problem since you planned already the Doepfer - A-140-2, naturally the Maths covers more than what the A-140-2 can cover but for starters I do think that's sufficient. Keep that freed space reserved first and buy those two modules later once you build up some experience; if you by then still want them... you will see: after building up your experience you will change your mind here and there a bit about what you think of modules and how to judge & appreciate them. That's totally normal, so don't worry about it for the moment hence the advice not to buy everything in one big go but build up your rack layout slowly step by step.
I would consider a 2nd filter though. Your choice of Erica Synths - Black Dual VCF is excellent. I just recently got this module myself and I am starting to fall in love with this module, finally I got again a filter module that provides me a lot of pleasure. It's a bit weird one and I am still learning but I believe this Black Dual VCF is a jewel ;-) But consider a second filter just for the variarity's sake.
Consider to add an audio interface (input/) output module though, makes things easier in life.
Good luck with the planning and kind regards, Garfield Modular.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads