First thing first i want to say that i'm not a modder. I know nothing about mods except maybe how to play it. So yes my idea could be stupid since they can't be made but well... Plus if you can't understand i'm sorry i'm a french man and i do my best in English
I have know Equivalent exchange from direwolf20 spotlight and when i have see him i was really enjoy of all the stuff. But my really concern was when he talk about the philosopher stone and that remind me so much thing about Alchemy. I was hopping to find something similar to Alchemy in minecraft. I was pretty sad when i saw that there is nothing really about alchemy in the mods.
I think you should start thinking about good old alchemy. Smelt ore into crucible, mixing it with some other stuff like rose essence, Coal Dust and hope to discover a way to create news matter or maybe just find good potion that give you buffer. Or maybe find poison that can kill your ennemy. The alchemy was all that in one thing. And it was the first "science" because you had to test stuff and try news combination.
So what my idea involve?
Making Crucible, furnace or something along those line. So we can smelt item into there primary form. Stone become lava, Dirt become ash, Metal become liquid.
Pipe to transport those liquid into some storage tank.
Storage tank of different kind to take care of all that. Keeping metal liquid and stone lava.
Some machine to extract some part of some ingredient. So you can put flower in it and get extract of that flower.
TIME :.. Okay that is the most important thing for me. I love the way how transmutation tablet can give you mostly everything in a second. But its OP at the beginning where resource are supposed to be hard to find. So in think on the first tier everything should take more time to do. Making Iron from dirt and cobble should be possible with a large amount of those two and lot of time to infusing the ingredient.
That lead us to one thing. But the most important thing. When i build IC2 stuff i make some room for it. When i build BC stuff i make it a room. When i play... Idk... ThaumCraft... I make a room for it. Your mods is too easy to use. I can just put my transmutation tablet on the ground and use my kleinstar everywhere. if you make more stuff that take time and resource storing so i could make me an alchemy lab.
Inner Nature, Time, Space, Light : Okay. Back to basic. Alchemy was some kind of a science but it was based on many cultural and religious idea. So when its come to mixe some stuff you can't just do it anytime. Sometime you need to do in when the moon is full. That should be used on your mods. If you end with some stuff that can control weather and time then you should have to be control by those at the beginning. So when you start making alchemy at the very beginning you should have to make some element only when its mid=day, midnight, raining or sunny bright.
That could take us to really want that item that give us the possibility to change weather and control time. So at the beginning waiting for Full moon to create Iron will be pain ITA. But then when you are tier two and can control time so you can make more of those Iron. But have to work to make you tier 3 stuff. With some RedMatter.
Well i think the mods should be some kind of a laboratory at the beginning. Making error, mixing stuff. Hoping to find a way to create good or bad thing. Because that was the true alchemy. Making stuff without a clue how to make it. And sometime that was REALLY bad... And i think your mods should be like that. Hard and time consuming at the beginning. Then since we make our way into the higher tier... Thing get better and you because powerful.
And that could kill the Op from the mods. Since you have to Hardly work on stuff to make it happen. Not only just put 3 thing in a crafting table to have the Best weapon ever see :x