Impossible isn't a word in my vocabulary. Let's Leeroy Jenkins into this shit. For scale, let's see just what 100,000 RF/t comes out to:
- 1,250 TE dynamos of any variety, since if memory serves, they all produce 80 RF/t.
- 2,000 XU culinary generators running bread. (50 RF/t)
- 625 XU heated redstone generators, or MFR BioFuel generators. (160 RF/t)
- 2,500 XU lava generators or pink generators. (40 RF/t)
- 52 XU high-temperature furnace generators at maximum heat. (1,960 RF/t)
- 3 XU nether star generators. (40,960 RF/t)
Note that these don't represent all of the options, and if you're playing on SSP and don't mind adding a mod or two, you can easily expand this list with potentially better options, like ReactorCraft, which can both meet and easily exceed your goal by at least ten fold. Going thru them, we can easily eliminate the more ridiculous options like having several thousand low-grade generators, or over a thousand dynamos. This leaves our best options as: nether star generators, high-temperature furnace generators, and as a last resort, heated redstone generators.
Heated redstone generators would work best if you could find a way to supply them with molten redstone, but that would require several magma crucibles, and would eat into your desired power output. If you could find a way to quickly, efficiently, and reliably generate a lot of redstone dust, this would be easier; Magical Crops would be a safe bet, if you've got the essence and the pack has the mod.
The high-temperature furnace generators require some complicated timing from what I hear, but you should be able to automate all that easily enough with the combined power of ComputerCraft and Applied Energistics. This has the advantage of requiring only normal furnace fuel, meaning you could easily supply it using charcoal from a tree farm.
However, if you have a tree farm, you might find it simpler to simply feed the saplings into a bank of MFR Bio Reactors, and feed the resulting liquid into a bank of BioFuel Generators, each creating 160 RF/t for 4.1 minutes, giving you 800,000 RF, per bucket of BioFuel. This has the added advantage of being able to use the wood as fuel for something else, like creating charcoal to fuel biolers or the above-mentioned high-temperature furnace generators, allowing you to split your power production between two different things, ensuring that you have less in the way of waste.
The obvious best choice would be the nether star generators, however, they come with three caveats. The first being the most obvious: they require nether stars for power. If you have a way to acquire soul sand and wither skeleton skulls automatically, this can be made fairly simple using a mod like MFFS to automatically kill the Wither for you and line the floor of your killing room with AE transition planes to suck up the nether stars you'll get. Number two is that the wither make a noise whenever it is summoned, and it can't be blocked by any known means and plays in all dimensions, everywhere, every time its summoned. The third is easily the most simple to deal with: the nether star generators will, when actively generating power, damage anything within what seems to be a 4-6 block radius, thus making them dangerous.
However, if you can lick the problems of nether star generation, they are your best bet in terms of power output per generator. As for transmitting the power, I'd suggest tesseracts on each nether star generator, as if memory serves, they can easily transmit the power you'll generate and send it to any point you desire without having to have cables leading all the way thru their little room.
