What mod do you think is the best for mining
Re Direwolf20 for 1.7.10:
For manual mining:
Thaumcraft's Pickaxe of the Core has a repair enchant, good speed, high durability, a right click function that will highlight nearby ores.
Thaumcraft's Primal Crusher digs 3x3 and has implicit self repair. It has low durability but with max unbreaking it repairs faster than efficiency v usage damages it. Can be enchanted with silk touch or fortune.
Tinkers construct pickaxes and hammers can be crafted to be super fast.
The ic2 mining drill uses eu rather than taking damage but cannot be enchanted. A fortune III variant requires an end game setup making you matter to produce iridium.
Quarries:
Thaumcraft a arcane bore does horizontal or vertical tunnels 64 meters long and 9x9 diameter (circular). Silk touch or fortune. They deplete the durability of the equipped Pickaxe but can run use thaumcraft a self repairing picks indefinitely.
The build craft quarry mines an up to 64x64 hole down to bedrock. If you run it over an ocean you avoid ugly terrain holes and lag. Can't do silk touch or fortune.
The ic2 miner can do 5x5 or 9x9 or up to 15x15 with the advanced variant. The normal miner uses mining pipe to dig down and extracts registered ores and can get stuck on lava unless paired with a pump. It cannot do silk touch or fortune. The advanced miner uses ic2 teleport technology to teleport up ores using either a whitelist or blacklist mode. It can also be setup for silk touch mining which will retrieve bee hives intact (but cannot do fortune enhanced mining). The normal version requires adjacent power production but the advanced version can be powered effectively with energy crystals.
Extra utilities has the ender quarry that is similar to the build craft quarry in capabilities but replaces mined blocks with stone without block updates for low lag mining. I don't know if it works in all dimensions in the default configs.
The mining tree sapling will retrieve ores from below the tree and bring them to the surface for manual mining. Don't know what the range is.
Blood magic has similar rituals that can draw up and harvest ores.
Railcraft has a tunnel bore that can dig a 3x3 tunnel for as much coke coal and railway track as you care to supply. No silk touch or fortune you have to retrieve the minerals from the trailing minecarts. The bore head also takes damage and needs to be replaced.
Steves carts has a somewhat more capable bore that I've never made.
Cc turtles. Limited only by your imagination. No silk touch or fortune as far as I know.
Applied energistics has material destruction planes that can harvest the world if you can move them (or the mountain)