New player here,
I've been playing a mission and just finished it, after I crafted a 3 star, shield, armor, weapon. I missed a helmet because I don't have enough 3 Advanced Alchemy Orb. -__-" I want to finish it already so I can go to the new mission. >__<" Someone Help!!
And you can buy energy using crowns. So, in summary, save up crowns to buy energy, use that energy to get orbs, use those orbs to craft your item, and you'll be able to pass through. (Yes, this may take a while.)
In the lower right corner of your screen (last I checked), there is a little display of your energy. You may have to show your Arsenal, to see it. If you click on that little energy display, then you can view the Energy Depot, where players buy and sell energy. There is no fixed price; it's a market. For more information, try the wiki page "Energy".
For advanced orbs, try to do Elite T2 arcade runs to find them, levels with a lot of treasure boxes have a higher chance of dropping orbs (Treasure Vaults and Arenas have a lot of treasure boxes). You can do elite jelly king because you can get advanced or elite orbs (both of them will help.) from there. JK's crown payout is also decent, elite gives around 2.7-3k crowns? I don't know, I usually don't pay attention to elite payout because I now do JK runs for the tokens.
I tried it also, but there is no available rooms for it. I tried Jelly King advanced. So hard to defeat the levels. >__<" So I'm just gonna go for Normal JK runs. I currently have 13k crowns. 2 runs will do. I will buy energy and I will just buy some 3 advanced orbs. xD Thanks for the help Soulstaker. :)
You can buy alchemy orbs from the energy depot.