Honestly after all rewards chests went up in price I have stopped purchasing ultimate chests. I usually get all tier one chests for minor and major chests and sometimes nibble on ultimate which is usually crap like a bunch of potions.

Do keep in mind that as you get up in level energy becomes a lot more expensive:

As you can see it costs me 5000 glint to get one energy so that 3 energy is worth 15000 glint to me, so I would be happy to get that chest as I would be 5000 glint in profit.