I've always found that one of the best ways of mining manually in the early-mid game is using an advanced nanochestplate paired with a mining laser on horizontal mode. Problem is gregtech. The harder mining laser recipe makes this a lot more endgame. But without gregtech I think it's a bit OP. For anyone who didn't know the advanced nanochestplate acts as an advanced electric jetpack and an advanced lappack with the protection of a nano chest plate.