Soft-shelled band is also a good option since it gives 20% stacking damage for 12s with no cooldown. As for the kraken ring itself, maybe changing it from a static +25 int, dex, str to something like at least +2% primary stat, +20% secondary stats might be better? Rings are more of a minor piece of gear, so I don't think they need to be crazy and on the same level of armor and weapons, but I do think the kraken ring proc should have a bigger impact than what it does now.