To be honest, I am not sure what precisely you're trying to pinpoint.
Over large enough tries (haven't decided yet if it's purely number of drops or ped spent or time), the hitrate stabilizes to your luck cycle for hitrate (A). In the way I mine, this seems to be a multiple of about 600 peds/server. Respectively triple drop unamped vs triple drop with L3 for me stabilizes after +- 200 drops. Or, maybe, after roughly 4 hours which take me to wrap up such a run. The lows of hitrate over this interval (drops/ped spent/time or a combination of all) for me is around 26%. The highs around 46%. The average 31 to 32%. Single/double/triple dropping seem to have different elasticity, with single the most volatile and triple the most stable. But then again, single drop the most manageable MUwise while triple the most difficult from this pov.
But then, over the hitrate comes your luck cycle of average tt size/find (B). In the L3 scenario above at 33% hitrate, averages with a considerable here and there leads to aprox 85%. Larges and a global here and there will generate roughly 10% tt extra. Subpar finds (modests mainly) will go toward 70% tt.
Then comes your luck cycle in hitting multipliers (C). So you can have a run with 25% saved by a hof or a run of 46% hitrate wich returns some 102% tt in total due to 0 big multi.
Then, the efficiency of the find (D). Which splits into two: objective rarity of the find (based on depth distribution) and MU (either by real consumption, such as iron, either by active balancing from MA, such as putty and ignisium).
Lastly, bankroll management (E) where you need three major areas: liquid peds for probes and amps, stacks in storage waiting to be filled and stacks on auction waiting to be sold. On Caly you can have 33% each, but on Ark the stacks on the AH and storage tend to go towards 40% if not more. RT is almost 50% 50% storage and liquid, since trading is more effective on Caly. And then again this varies for particular resources, ignisium gets sold even at 30tt in minutes maybe while edres resin (comparably rare) barely sells 100tt per week.
Out of ABCDE combination you can actively manage and influence only A and E, while BCD are dynamic and you can only observe and speculate. Completely counterintuitive, you should also only worry for A and E. There is no point in pondering SO much on hitrate and tt found. Yes I would advise against pushing blindly in an outrageous scenario of say 20% hitrate, but that's about it. For the rest, it averages over time.
My current log for example at aprox 11k tt spent points toward 103% tt return and I would presume at circa 12k I would reach 100%. Ignoring ofc the tower from yesterday, I consider it a jackpot. MU overall I think points toward +600. I think, because I had a spree of shopping on Caly 1 week ago and I think I buried into that some 700 peds on various items. Out of all mentioned factors, it did not affect me so much mining this server or that server, doing unamped or amped, overlapping 1% or not at all, looking at the sun inclination and what not. No, the only sensible thing which almost destabilized me was that shopping spree.
Sure, by all means, if you have a passion in analyzing stuff, go on with it. But I know you since forever, if after all these years, all these stats push you to depleted cc, maybe take a step back and focus on what you can manage instead of what they can manage and do their best to not let you see (as is naturally to be, btw). Apologies if this feels like lecturing, I am not who knows what master of mining. But my mistake was jumping through professions almost like ADHD, while you stayed on mining all this time. Should also benefit your own pedcard with all these ideas and observations, not only the community.
Cheers mate and gl
P.S.: I also believe there is a descending curve over time so you don't do some 100h run mining same field over and over. Similar somehow to the anti-camping tt evolution observable in hunting. So you need to switch areas in a decent manner to somehow mitigate this.