>>111122745Development often has stages and different branches. It doesn't go straight from the prototype to a final product. In this case it was:
1) travel lantern exposes the Malthusians to the emotional spectrum tech
2) Krona creates tech that allows to tap into and harness the energy of will, and makes a prototype of this tech in the form of the gauntlet
3) Rami on the other hand creates the phantom ring in an attempt to harness multiple emotions at once, closer to the original travel lantern tech
4) the phantom ring tech is considered too unstable and dangerous to the user to pursue, while the gauntlet tech is deemed sufficiently stable to develop further
5) with time the gauntlet tech is perfected and miniaturized into ring form, with the battery becoming a separate device for safety reasons
At least that's how I remember it.
As for the Starheart... let's not even go there anymore, there's like 10 origins for it at this point.