Post 75 subjobs

[Scuro]

/nin is common, and most often used - shadows, evasion and dual-wield
/dnc situationally - good for duo or solo dual -wield, aspir and drain sambas, dances for emergency heals, eva boost
/thf rarely - eva boost sata physical spells, only really used upon request or when using blu to farm
I've never used /rdm...seems to me to be situational, as Kwate said, but I can see how it would be useful
any other subs would be if you just wanted to be different

I'm going to agree with mostly all of this, /THF you don't really if ever use anymore unless there are no THFs in party (which really never happens anymore) and you need a shitty form of TH. DNC is good, but I rarely get to use it. /NIN is really where its at for BLU because if your doing damage and such with your job, your going to pull hate eventually and those shadows are going to save your arse. Finally /RDM, I find this is a good subjob, but not for DD purposes. If your going to sub RDM, your going to be a backline BLU with Magical Spells rather then Physical. If you go in abyssea BLU/RDM and have Atma of the Minikin Monstracity + Atma of the Ultimate + Atma of the Impregnable Tower = Win. The damage is noticably increased vs having a /NIN, /DNC, /THF sub.... Yet that should be pretty apparent as to why. With Magic Attack Bonus, Fast Cast, and Clear Mind that you don't have to equip for (lets face it, most of us don't equip for these job traits, and although its tier 1, its better then nothing, as you would get from /DD)

In a nutshell:
/NIN for solo'n, small groups, Tier 1-SOME 2 NMs, Non-Abyssea, Abyssea parties
/RDM for Abyssea NM or non-Abyssea NMs you can't DD on due to harsh AoE or deadly TP attacks, so you have to cast Magical Blue Magic.
/DNC for kicks and giggles
/THF for TH?lol

[Kwate]

In a nutshell:
/NIN for solo'n, small groups, Tier 1-SOME 2 NMs, Non-Abyssea, Abyssea parties
/RDM for Abyssea NM or non-Abyssea NMs you can't DD on due to harsh AoE or deadly TP attacks, so you have to cast Magical Blue Magic.
/DNC for kicks and giggles
/THF for TH?lol

/THF was exceptional for SATA, but with new spells and the addition of Efflux, we can consistently spike damage, so it almost completely eliminated the need to ever go /THF. Also SATA helped with hate control (mainly for pally's to maintain), but with most DD's being tank capable (outside of RNG), hate control isn't ever an issue.