i have Vert 5/5 for the solo aspect, being able to nuke a mob down faster because vert is on a 8:20 timer over a 10m one is ideal
but then my RDM is merited out for solo play
ENF/ELE 8/8
Ice Potency 3/5 + Aquilo's (for key binds)
Wind Potency 2/5 + Auster's (Gravity is good if its stickable)
currently bio3 2/5 + Pluto's (going to full 5/5)
still deciding my other t2 merits
as far as HP/MP merits go, im 7/8 HP+ for my main PLD so as RDM/NIN solo i only get to work with about a 650mp pool in my idle set ; ;