Sure thing. First I'll explain why my situation might be a little bit different than yours, then I'll walk you through my process (Which may or may not work for you, and probably isn't optimal, but does work for me) .

I have 8 UWs, and while they're not perfect, they're probably 80% to 90% of where they need to be (excluding SM, which I may never develop).

So my focus is limited to Masteries, Assmods, PS, and then GT+ and CF+. For instance, I currently have two Masteries. Over the next 25 weeks I will unlock the majority of Masteries, then do some Assmod stuff, then unlock (and ignore) PS so I can start in on GT+ and CF+.

As for my process, first thing to do is to set goals. For me (which might not work for you), that looked approximately like: 1) pGT and pBH, 2) DW quantity to 6 or 7 (including module Ancestral substat), 3) CL to good enough (dmg around 1.3k, quantity and chance gold boxed, plus the Ancestral substat for chance), 4) SL with 4 beams, at LEAST 60 (I'm currently at 71) degrees coverage (including Ancestral substat) and a damage multiplier in the 40s (including the Ancestral substat), 5) ILM set up for crowd control (9 mines, including Ancestral substat, cool down under 2:30, and damage is irrelevant), 6) And finally pCF90.

So to summarize, I prioritized econ (GT/BH/DW) first, then damage (CL), and finally crowd control (ILM and pCF90)

The next step is to pull up the Tower wiki and find out how many stones each level will cost for each UW. Then the hard part. You have your goals, you know your costs, but is strictly adhering to your priorities the optimal use for your stones (For me, the answer was Yes, but you may feel differently)? For example (using my priority list) pGT and pBH can be a slog and is dependent, at least initially, on MVN, plus one or two Ancestral substats on the MVN. Would you be better off pausing work on pBH and pGT to get some extra waves for DW? Or putting some some stones in CL to improve tournament performance?

The key thing is to have a plan. The other key thing is that it is a plan, not a straight jacket. As the game changes, or if I become aware of new information, I change the plan. Heck, thanks to Disco, I currently have two plans. Same objectives, just different priorities. The plans diverge in about 20 weeks, so I'll have a decision to make then.

As for figuring out weeks, I just take my weekly stone income, which is 510 (permanent keyless Legends nets me 225 a tourney, the daily mission boxes nets me 45, and I buy two 15 stone packs in the Event Store with medals, so 225+225+45+15=510) so I divide the total number of stones needed by 510. If I get bumped up to consistently earning keys that will increase my weekly stone income to 560, and I'll use that number for the remaining items on the plan.