OP, sorry, but you're going about this the wrong way. You should NOT just be looking at "Use x engine and place X,Y to run Z." That just won't help you actually learn the mod.
It's actually one of the simplest mods out there. It's incredibly straight forward.
First, get your handbook, and look up anything you want to power. You can also have the item in your inventory, and hold shift over it. Between these you can get the full requirements for the item. ( If you have the item placed and it can be right clicked, there's a little arrow on the left that will take you to the items page. )
The Power rating is the total amount of power needed. So, 1 MW. The torque times the speed gives you the power. You can really ignore the units. So, for 1 million power you can use 1 thousand torque and 1 thousand speed. ( 1,000 x 1,000 = 1,000,000. ) You can also do 10 torque and 100,000 speed. ( Note the actual numbers are squares, as previously mentioned. )
Find the engine, or engines you want to use to supply the required power.
Look at the torque first, because you always want that at the minimum. More torque doesn't usually help ( except the friction heater. Keep the torque and speed as close to equal as possible for that one. )
Remember though that the more speed you put in, the faster most items go. You mentioned the Grinder is slow as molasses: It's not. It's probably the fastest ore multiplier ( and x3 at that ) of them all. IF you put in the speed. With a single tier 4 magnetostatic, I can run through more than a stack faster than I can use a lever to turn the engine on and off.
Because your engines already meet the power requirement, setting the torque to the minimum required means your speed is already correctly set at the max for the power you are putting in.
Now, and this is a key step: Get an Angular Transducer, and start checking each of the pieces to see what kind of power they are getting. Make sure the engine is running at full speed, that you didn't accidentally set the gearbox to speed when you wanted torque, that the shaft junctions are merging power, not splitting, etc. Remember: Gearboxes are to be thrown out if they take any damage at all. 1% of damage is a 1% power loss...and because everything tends to line up exactly on the power, losing 1% stops it from working in most cases.
From this, you will find the bedrock breaker is easy to run. Go down to the bedrock layer ( it can't do the bottom layer btw. ) and go to town. I personally used a Micro Turbine to get the first bits of bedrock, because it meets the total power requirements. Make sure to use the bedrock breaker initially btw. Not the Borer to break bedrock. That thing requires a HUGE amount of power to do it.
Some notes on the other items:
Shaft Junctions have Split or Merge. In Split you can adjust the ratio of the power that goes straight or to the side.
Gearboxes: Diamond is awesome since it doesn't use lubricant. They are set and forget.
AC Engines, and Magnetizing Units: Use a project red Timer for the alternating input. Set them to the fastest they go. You will get constant power out of the AC engine, and the Magnetizers will work.
Now, for the Magnetostatics, which are insanely power efficient compared to the regular RoC engines:
Set up an AC Engine to a Magnetizer. Make an entire stack ( 16 ) of the Tier 2 upgrades, and put them in there to start charging. If you do this first, you will save yourself time later, as it takes around an hour to charge them up.
Next, make the Engines and Tier 1 upgrades you want, based off of the amount of resources. Set the engines down, upgrade them. Check on your Tier 2, find something to do ( like mine for more resources ) while they get up to 720 micro teslas. Upgrade the engines to Tier 2 once they reach 720.
At some point you'll need a Pulse Jet Furnace, as well as you will need to Silk Touch redstone ore and run it through the extractor. ( Only need like 1-3 ore per Tier 4 engine upgrade, depending on luck. ) then a Friction Heater running off of some pretty serious power to melt the Tungsten. Once you get 1 magnetostatic to Tier 4 though, it works wonders on the friction heater. BTW: You only need to meet the temp of the heater very briefly, so micro turbine would work without using too much jet fuel. Once it starts melting the Tungsten, it will be running at like 10 smelts per second, so the little bit you need will go extremely fast once you get temp up to par. At Tier 4, the Magnetostatic is 8 MW! That's 4 MicroTurbines and yet it doesn't use any Jet Fuel. It uses a bit less than 1500 RF/t, which is just 19 dynamos with a bit of power to spare. A simple EnderThermic Pump in the Nether and Magmatic Dynamos can handle quite a few of those magnetostatics.