Best order to improve my TH13 Hero Equipment

Hi guys, I am currently using only air attacks and am using the following equipment: - BK: Spiky Ball and Earthquake Boots - AQ: Giant Arrow and Puppet Healers - GW: Eternal Tome and Rage Gem - RC: Electro Boots - MP: /

I am TH13 and the current levels are as pictured. I'm waiting for the next event to get the epic gear they will release but mostly the Magic Mirror and Rocket Spear (on the Fireball I'm pretty uncertain and I think I'll get it later).

What do you recommend I max first? (Common Lv.15, Epic Lv.18) - BK boots and ball? - Do I focus on the newly unlocked RC, perhaps buying the Rocket Spear? - Do I focus on the Magic Mirror by unlocking it and taking it directly to Lv.18? - Should I upgrade the two MP equips to support the air army, sacrificing the BK?

I am aware that some nerfs have been done and that the Electro Boots do not work well together with the Rocket Spear, but unfortunately they are still not TH14 for the Hogs...

Thank you very much in advance for any advice you can give me! 🙂