New energy cost system for fights and battle chests

First of all I am not entirely against it but it needs some balance I think. Maybe this system with more energy cost per fight should stay but I think its too expensive. Turns to be that energy is limiting factor esspecially for F2P too ( for them its to hard to make 100 fights a day in combination with guild boss raid and that is daily target for most of them) Also I think 1 energy per battle chest opening is too expensive. Now we must choose are we going to fight or opening chests.
Not sure about numbers but here is sugestion:
After 50 fights - 1.2 per fight, the 100 goes to 1.4, 150 1.8 then 200 is 2 per fight. This will keep us to grind like before.
For battle chests 0.3-0.5 per opening is something reasonable or some option to choose chest with or without TLRPG before opening. With TLRPG cost 1 energy, without TLRPG is free.