The most expensive miners in the mod IR2 require diamonds. These are rare to find and expensive to craft (using cubic press).
With the TA miners mod, diamonds become useless ... also the miners are too cheap on the IR2 resource scale.

There is also a problem that flying robot frame recipe is hidden in the IR2 mod, making it impossible to craft the mantle extractor without hacks.

Suggestions:

• require diamonds in moho and mantle extractor - maybe 10 for moho and 100 for mantle?

• replace/remove the flying robot frame requirement (similar old discussion here: https://mods.factorio.com/mod/vtk-deep-core-mining/discussion/5d820d7d01184e000c302928)

• consider to use IR2 advanced steel plates / intermediates instead of vanilla

I'm going to make a fix for this really soon thanks for the notice!

Thanks for your time and effort, I love this mod for its TA nostalgia and mining ease!

If you want I can make more detailed recipe proposals?

Yeah that wold help a lot thanks also I'm very sorry I had since a month (more) a big update of the mod that I was sure was uploaded... (1.1.2)

I'm going to push that update really soon because it change quite a lot of things in the recipes...

I experimented a bit and came up with the following.

crust_extractor: unchanged

moho_extractor:
{"crust_extractor", 1},
{"chrome-drill", 2},
{"steel-plate-heavy", 250},
{"pipe", 100},
{"speed-module-2", 10},

mantle_extractor:
{"moho_extractor", 1},
{"chrome-drill", 5},
{"invar-plate-special", 250},
{"pipe", 200},
{"speed-module-3", 5},
{"diamond-gem", 100},

technology:

• remove dependency of mantle_extractor on robotics

• add dependency of moho_extractor on ir2-mining-2 (which enables chrome-drill)

done but the technology edit is still not possible with the current code, sorry (1.1.3)