Board Thread:Roleplaying/@comment-1734134-20190906112145/@comment-25684606-20191011163422

Imp, you might have an easier time handling Space Marines if you adapt rules from Chapter V of the Daemon Hunter book, which has rules for Grey Knights. That could provide a solid base to proxy a Librarin from, right? There's also Deathwatch which probably has explicit roles for Space Marine Psykers. Not familiar with it myself but it might be worth checking out.