For left side of the gear, melding Det/Crit seems to be still a top-fashion, while melding STR for right side of gear has become a static, reliable source of little dps increase (just like ^ Kabooa mentioned)

You can now farm weekly materia Grade V from Void Ark runs to meld new Allagan Tomestones gear. The drop is guaranteed for everyone, so no rolling. You can exchange Dark Matter for materia in Iddylshire at goblin near aetherstone. Direct <flag> will be given to you in shout, it will be less complicated than remembering numbers if i give them here.

You can also farm materia Grade IV from ARR daily beast tribes, but i don't know, if it is something new for you.

For basic stat allocation, buy Hymn at your GC and relocate all into VIT for best performance.
I confirm, that around 20% of actual attack power is lost since 3.2.

Tank stances are now generating additional aggro, so for low-level dungeoning it has become a struggle to clear content, thou its nothing horrific, you just need to use flash/overpower/unleash 3-5 times more.