Tedium ≠ Difficulty.
If you want difficult mods look at Ars Magica and Arcane Scrolls. They provide some really powerful tools, but at a cost. Both of these are XP, Ars uses its own XP system, requiring you to go out and use the spells. Though, the balance is if you use a spell too much the experience increase drops drastically, requiring you to make more spells. In Arcane Scrolls you have to get xp to learn the spells, which makes you go out and fight stuff/mine. Mods like GT and the things you are looking for are just going to take some of the fun out of this, and replace it with tedium. This is not the way to go if you want difficulty. Overall, if you run a server, and you make something way too tedious, people will choose a different route (in FTB for treefarms there are the options of turtles, golems, steves carts, etc.)
If you want difficult mods look at Ars Magica and Arcane Scrolls. They provide some really powerful tools, but at a cost. Both of these are XP, Ars uses its own XP system, requiring you to go out and use the spells. Though, the balance is if you use a spell too much the experience increase drops drastically, requiring you to make more spells. In Arcane Scrolls you have to get xp to learn the spells, which makes you go out and fight stuff/mine. Mods like GT and the things you are looking for are just going to take some of the fun out of this, and replace it with tedium. This is not the way to go if you want difficulty. Overall, if you run a server, and you make something way too tedious, people will choose a different route (in FTB for treefarms there are the options of turtles, golems, steves carts, etc.)