I agree with your top six and would lean towards Army Camp Boost of them.
Alloy Values and Army Cache Boost are the clear 1a and 1b in my opinion - no arguments here.
Cache Boost is my least favorite of these. I think it has a lot of merit at the Insane level but at the Legendary level it’s hard to squeeze into the rotation in lieu of cooling down TW, cooling down SAC, Army Cache Boost, Hospital Boost. This narrative flips in my mind when talking about an Insane Cache Boost however.
The others are pretty comparable but the big difference is that TW/SAC are actually decent at a lower level. Time Warp is very useable at Epic or even Rare. SAC is even useable at Uncommon.
I suggest you take the Legendary Army Camp Boost and you can supplement with worse versions of the other two quickly in the other side of the super ascension.
I've been having to wait to get a first place in battle, so wanted to buff that, and with a backup sac, I'm ok for the 10 days of upgrade. I've been having the problem of not having the artiys that I want to upgrade available so I wanted some more slots for fodder.
Alloy Values could work iff you have the auto-sell, auto-market maxed out-- I think Crypt uses this strat and he's successful, but otherwise as you said AcampB + AcacheB + SAC + TW is the default
If you have +100% Territory money Adv, maybe Insane TMB? But probably AV w/auto-sell/market still gonna get more money overall
So what's the goal now? Surely with 5 Insanes and 775% AP you're not getting that much faster with each SAsc you do and require alot of SAsc for a noticable speedup. What's your end goal?