Hmm. Some interesting points here. The tear stone actually is a good replacement imo. Even if you get it later on you can forge a ring or something.
But, if we want to get a little bit crazy- the idea I'm toying with is the rusted sword that turns into the Robber's Blade can swap with the Vial.
I'll try not to make this a wall of text, but my thought process behind this is: You get this from a chest that you need Parch for at the end of Aqua's Rock. If you go to Aqua's Rock as soon as you get the boat (which honestly, most veteran players that this mod is aimed at probably do) and get this rusted weapon immediately, you still have it for such a tiny amount of time before it is outclassed. Main reason for this is where the Lightning Sword is obtained though; right below Yallam where you have to go to use the blade anyways, and is also blocked by Parch (Burst too, but Tundaria Tower is so short that makes Burst being an obstacle irrelevant)
But maybe the real solution here is slightly buffing Robber's Blade. Lol.
TL;DR Tear stone good, consider Robber's Blade?
But, if we want to get a little bit crazy- the idea I'm toying with is the rusted sword that turns into the Robber's Blade can swap with the Vial.
I'll try not to make this a wall of text, but my thought process behind this is: You get this from a chest that you need Parch for at the end of Aqua's Rock. If you go to Aqua's Rock as soon as you get the boat (which honestly, most veteran players that this mod is aimed at probably do) and get this rusted weapon immediately, you still have it for such a tiny amount of time before it is outclassed. Main reason for this is where the Lightning Sword is obtained though; right below Yallam where you have to go to use the blade anyways, and is also blocked by Parch (Burst too, but Tundaria Tower is so short that makes Burst being an obstacle irrelevant)
But maybe the real solution here is slightly buffing Robber's Blade. Lol.
TL;DR Tear stone good, consider Robber's Blade?