I confirm. I don't know how Captain fought there, but my 210 skeletons and 5 knights broke through the moat and almost gave it to them, but...
We just have different skills (c).
on turn 117 I just surrender at the birds' external dwelling, got frustrated and wrote gg. Luna was level 8 with expert Fire, expert Wisdom, advanced Earth, starting Sorcery, Pandora's box gave all Fire spells, total mess in short, but I can't play as Conflux
To me, the most logical way to take the Conflux birds' external dwelling seems to be an attack by a mage with 6 fairies and a lightning bolt. Then any scout hero takes it easily.
I don't know about that, in my opinion the games go pretty quickly; kalababa, dimast, and I played 122 hours in 4-5.