With the rising price of energy and my concerns about all this wasted energy and heat I have, my brother and I, both of us regular players, have thought of a few solutions to both.
Energy:
Normally we'll go adventuring some days and we'll make it out with some mist energy left but we don't want to go in again nor is it enough to alchemize anything. So...
1) Service to convert mist energy to crystal at rate of 50% due to mist not being as pure as crystal, the mist needs to be compresses and processed before it can become a crystal.
Additionally, to help keep energy in some sort of balance
2) Mist tanks for sale at constant price
Heat:
Sometimes I have fully leveled equipment and yet I'm still picking up tons of heat, all which goes to nothing. At the end of the stage I advance and the heat disappears. So, I propose 2 choices at the end of the level
1) Convert Heat to Crowns
2) Distribute Heat to Equipment
Of course with the equipment fully leveled it would automatically select convert into crowns.
Health:
With all these hearts around the stage, there are times when I have full health and can't pick them up. However, later in the stage I get my face smashed in and wish I had those hearts because now I'm all out of potions. Solution?
Heal Canisters
Different from the normal canisters that just increase your health, these store extra hearts you pick up which you can then use as an item. They only refill how much health needs to be refilled if you have that many hearts stored. The only time they fill up is if your hp is already full. Everyone starts off with one that can store 5 full hearts, it costs crystal energy to upgrade to hold one addition al, each upgrade costing a little bit more (first upgrade can be 10 ce, fifteenth will cost 800 ce). The item is permanent.
I was thinking about posting a condenser suggestion on here when I saw your post. My suggestion was going to be having either every 10 ME = 1 CE or having 2 ME = 1 CE but you'd have to buy the condenser for quite a few crowns (a couple thousand). As for the e-tank idea (and that's what the idea really is) is kinda genius. I don't know how many occasions I've found a supply of hearts then passed through a party door and couldn't get back when I needed it. The ability to store hearts would come in handy and ad another bit of strategy to the game. As for the heat that is definatly a problem. However I don't think they should be able to transfer the heat to other items. If they weren't used they they didn't earn any experience. The only way I could think of spreading this would be something similar to the EXP. Share from pokemon. Another decently priced item that could be used to add a single unequipped item to the heat transfer. Upgrading to add more would be expensive too. Otherwise I agree completely.