Best in Slot for SMN after 2.1?

[Maelwys]

So SMN acc cap is around 450 for Turn 5? I know Melee is around 480. Is 450 not a bit low?

If memory serves, the caster accuracy cap for current content (includes Coil T5) is ~435.
The reason people go higher on SMN is because pets have a higher cap (and don't inherit food buffs) so ~445 or slightly higher is required.

Melee Acc Cap in T5 is somewhere between 473 and 482.
It will be incredibly rare for you to miss with anything over 472 accuracy, to the point where I'd be triple-checking my log just to make sure it happened... but people have reported the (VERY occasional) miss up to 481 accuracy. Most notably on the T5 snakes.