Im fine with what mods go where. It makes sense The elemental thing Im eh on. I get it but don't like it. I personally think they should make all current perks in the game not tied to an element. Then start making some that are based around that element. So like a solar armor could equip a mod that does like a burn effect to anything that melees you. Stuff like that. Regarding the energy system, 10 isn't enough and things are too expensive. Make it like 20 BUT Everything up to 9 is just glimmer, shards, cores with 9 being 4 cores. Then 10 is one prism. Thats it. 1 prism. Then from 10 to 15 its the same just tag on shards and glimmer. However 15 to 20 is an instant leap granted by an ascendant shard. This way you still have to grind and it is still pricey but its reasonable. Its one of those things where you can sit down and probably get a full set of gear to 20 in one day while doing high end activities. Lets be honest, if you're not doing difficult end game stuff you probably don't need to have high tier armor anyways