I like the mod and thank you for making it.
But did set so laughable low costs for the technologies?

I consider Yuoki as overpowered. I mean everything is twice and more better, then vanilla or other mods. But it has cool graphics and nice stuff. So in my opinion the technology must be extrem expensive to compensate the imbaness. (First few techs can be stil "cheap", because they are basic...)

I have modified the mod for me and set high costs. Some of them are crazy. This is because I want to make them in some way "locked", because they are too imba and also to get another challenge in the game:

Tier 1
yi-raw-materials: 300 science-pack-1

Tier 2
yi-intermediates: 500 science-pack-1
yi-ammo: 2000 science-pack-1, 1000 science-pack-2
yi-ore-processing: 1000 science-pack-1
yi-fluid-handling: 500 science-pack-1, 500 science-pack-2
yi-atomics: 20000 science-pack-1, 10000 science-pack-2
yi-lights: 500 science-pack-1
yi-inserters: 1000 science-pack-1, 500 science-pack-2
yi-walls: 5000 science-pack-1
yi-modules: 2000 science-pack-1
yi-basic-machines: 2000 science-pack-1, 1000 science-pack-2
yi-tools: 2000 science-pack-1
yi-power: 5000 science-pack-1, 5000 science-pack-2

Tier 3
yi-advanced-inserters: 1000 science-pack-1, 1000 science-pack-2
yi-ammo-turrets: 500 science-pack-1, 500 science-pack-2
yi-advanced-machines: 40000 science-pack-1, 20000 science-pack-2
yi-oil-atomics: 5000 science-pack-1, 5000 science-pack-2
yi-recycle-atomics: 2000 science-pack-1, 2000 science-pack-2
yi-storage-atomics: 1000 science-pack-1, 1000 science-pack-2
yi-water-atomics: 20000 science-pack-1, 20000 science-pack-2

Tier 4
yi-electric-turrent: 30000 science-pack-1, 20000 science-pack-2, 10000 science-pack-3
yi-advanced-modules: 10000 science-pack-1, 10000 science-pack-2, 5000 science-pack-3
yi-advanced-power: 5000 science-pack-1, 5000 science-pack-2
yi-logistics-research: 5000 science-pack-1, 5000 science-pack-2, 5000 science-pack-3
yi-reputation: 2000 science-pack-1, 2000 science-pack-2
yi-advanced-tools: 50000 science-pack-1, 50000 science-pack-2, 50000 science-pack-3
yi-advanced-ore-processing: 10000 science-pack-1, 10000 science-pack-2
yi-organic-oil-atomics: 2000 science-pack-1, 2000 science-pack-2
yi-power-armor-equipment: 100000 science-pack-1, 100000 science-pack-2

Tier 5
yi-smelting: 5000 science-pack-1, 5000 science-pack-2
yi-ultimate-reputation: 5000 science-pack-1, 5000 science-pack-2
yi-mastercraft: 10000 science-pack-1, 5000 science-pack-2
yi-power-armor: 1000000 science-pack-1, 1000000 science-pack-2

Cost is low mainly because there is still progress gated by the Yuoki mod's themselves. Just because you unlocked the advanced machines does not mean you can build them unless you can make the high cost components as well -- which is the traditional progression of the Youki mods.

My goal on science cost was to make it require at least the vanilla tier equivalent packs, so to match vanilla you could not get logistics bots without blue science.

I also play with angel's ores so Youki's ore is much harder to get and not in high quantities.