Well as for a time before first summon we easily did like 15 kirins with MNK/nin Veret WAR/sam Ukon Brd marches THF (just SA TA) and WHM. No 2hr is needed with just mnk and war with empyrean. Usually it took 90 sec about 60 with me, war or brd 2hr (not all at once).
Unless you did it brd mnk mnk Tsuko don't say it's good idea. With setup I did above WHM was constantly spamming cure even with me trying to keep shadows. It spams TP moves one by one (he swings less then it do TP moves) You are lucky if it casts quake. Most dangerous are great whirlwinds which do like 600-700 (I'm not sure if WHM gave us baraero which could help). I doubt replacing WAR with MNK would cut it's TP gain enough to BRD be able to keep up on curing. there is also AF which will make around 800 damage. Even if BRD would maybe somehow keep up on curing he would definitely ran out on mp. WHM MNK MNK is much safer bet. Lack of marches hurts but being in need to spam shadows especially :ichi hurts more. Idk how it would go without empyrean but WHM and 2x Veret MNK (or MNK replaced by other job with good empyrean or even non empyrean DRG for example or DNC, in fast DNC would be probably very good in pair with Veret or Ukon) can take it down before first summon.
I also took it down easily with WAR Ukon PLD Ochain+Almace BRD WHM THF (sa+ta). Once we killed it in the time of summon because WAR died at 80% and I needed to duo with THF (tho WAR thrown two Ukko's in while weakened which took good 10%).
I think Duo might be possible too. Very good SMN + for example good DNC could probably handle adds and Kirin. Summoner could take Suzaku and trigger CS with Leviathan. DNC could probably kill genbu and tank kirin at the same time, same for byakko, Ramuh stun is very potent too can probably easily stun Seiryu HF at start run away and in the time it will run to kill summon the run back to DNC it will lose all HF. Of course I never did it that way but it seems really possible.
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