All apollyon zones are easily clearable by blu, and I've seen the blu mat drop from all of them, so on that front I don't think it matters much which zone you pick. For temenos I would stick to west, and only open chests on odd floors, since blu mat only drops from those. I would recommend swapping spells to cleave the vultures on the final floor.
Well I'm mainly using req -> QC on old content, where req actually does fine (1.5-2kish in limbus/dyna/etc, and that's with a mediocre set for it), and is pretty comparable to other blus CDC from what i've seen. For VW obviously I'm not SCing at all, and for abyssea I use vorpal -> QS, unless I'm not using crit atmas.
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