Gotta find a skeleton dungeon, what I would do is funnel them (water or interdiction torches) into an area where you can use a timer (or pressure plate) to set them on fire. To easily retrieve the items you can use a transposer or filter.
I have something similar nether side but I use a geothermal and energy link instead of redstone engines.
World side I just use a pump and deployer. Manage to feed 7 geothermals + tanks.
The launcher requires any computer made within the last 10 years. (Providing it is X86)
However if you would give us your specs or computer model then we could determine how well you can expect minecraft w/ the tekkit modpack should run.