Took a break from Ver. 2 bosses to do boss rush, and found it incredibly easy (was Reimu 154).
The only hard part was bashing my head against the wall against the Final Boss when I had no TP to switch chars (0,0,2,2) and all my guys out were defensive (Meiling, 18F, Patchy, Reimu) 'cept for Patchy, but ofc I'd been Djinn Stormed. So I was constantly waiting and focusing for SP, and crying whenever she Djinn Stormed again. Finally got Meiling killed and brought in Youmu, who brought the pain (and could actually focus worth a damn, yay!)
Glad you got the character working Esoterica, 18F should do you well up there, methinks.
...Now off to beat the Final Boss normally again so the game will give me my 3rd star...