I’m not sure linker 3 is worth it in this build.
But if you want to make a support build, linker 3 is great.
Lifeline is amazing with the right party. Even a full CON wiz can feel like a killer if there is a high INT char in the party. It’s even better for if you have a high DEX and a high STR in your group. Just imagine the damage from that Magic arrow in a bossfight.