Vajra is the most powerful tool you can craft as part of the
Gravisuit mod. With it, you can break almost anything (except bedrock, warded stone, force fields) with one hit. You can even silk-touch any block by right-clicking. Most mobs will also die in 1 hit (endermen in 2 hits). It does consume a ton of power with each use, but by then you're practically on god mode.
Compared to the cost of making a Gravisuit, it's relatively cheap. And with MPS armor with an elite battery, it will go a looooong way.
Why I mentioned that, even though this is a Dartcraft-related thread, is because people keep complaining about game balance, when the core game is not meant to be balanced in the first place. I could not stress this point enough.
Don't believe me? Then why not switch to creative mode. Why is there a creative mode? Because Minecraft is, first and foremost, a creative endeavor (and I highly recommend you read more on Minecraft's history). And a full Gravisuit actually provides you the means to get creative-mode-like capabilities, while staying in survival.
Sure, mods give us the technical challenge, but at the end of the day, when you've collected enough resources, you practically play in creative mode anyway. Only difference is
- You can die.
- Flight may or may not be available to you.
- Mob management.
Some mods will allow you to get there sooner (like Dartcraft) or later (like Gravisuit). Choose your poison.
Seriously, if someone complains about any mod's game balance, I suggest try playing with a pure-GT based world, on the highest difficulty setting with Minecraft hardcore mode enabled. That might change your mind.