VaRomiMo
This is a leightweight modpack most computers should easily be able to play.
It has a lot of PvP Stuff in it.
You can easily mine your ressources with a Quarry, save them in your Me System and then destroy everything while you are on a ship flying through the air.
Because of the focus on PVP there are not much big Tech Mods inside. Only a few like Buildcraft and Mekanism to ensure a quick and PVP focused gameplay.