15 days ago - KissingAiur - Direct link

You don’t have to meet the requirements of both Woe and Rot Grip, just one of them to put points into Singular purpose.

Here in this screenshot you fully met the requirements, Rot Grip has 4 points invested therefore you are able to invest into Singular purpose.

15 days ago - KissingAiur - Direct link

Yes it is intentional. It’s to allow players to pick two ways of specing to get to the second node.