Definitely switch to the badge belt, it's on par with the heroic putricide belt since it's a lot better itemized (more arpen, and haste instead of crit).
It would be an upgrade if you can get your paws on a FoS trinket, or even a DMC:G. But since it's your offspec you might not be motivated to farm/spend too much gold for those (and regem to the softcap if you go for the FoS trinket)
The other option is to wait for a WFS to drop.
Since you can't get to the hardcap yet, try to still go for the yellow sockets with +6 agi bonuses (gloves/badge belt/legs/chest) with a 10agi+10crit or 10agi+10hit gem. You could also buy the triumph ring to replace the planestalker one, it's really well itemized.