Carbuncle.Virtuosus said:
Quint Spear will let you use Namas more than either will, but I believe 2-4 Magian GKT will net the most overall DoT? Don't take my word for it though. All I know is Quint Spear gives some insane WS spam.
It would depend what you're fighting. If you're fighting a high def mob, yeah right, then the magian gkat would do better. If you're fighting a low def mob then the spear would do better. It also depends if you're fighting a slashing or piercing resistant mob. The proc rate on the magian multi hit weapons is not as high as their counterparts. for instance ridill procs more than khanda because the magians have a higher proc rate on the chance of hitting once.
I'd say go for the polearm and work on getting a multi hit gkat. Or just get a masamune it'd prob take less time than doing the 2-4. If you have a Blu friend who can charge whisker a bunch of mobs you could potentially finish the 2-4 in very little time tho I finished my friends thunder staff in under 5 hours.