In Spess Marehn's defense, that's not because of a lack of tactics or common sense, it's because they're functionally invincible against anything not as nasty as they are. They don't do bum-rush charges into Tyranid hordes or fortified Chaos Marine positions; a knot of pathetic heretics and mutants like this would be no challenge, so they would cheerfully charge in. They're perfectly capable of a measured tactical advance if stuck in against an enemy capable of exploiting them if they overextend.<br/><br/><br/>As for Arkhah being wounded, he's at full HP right now. After this mission is over, he'll be getting severely thrashed in his attempts to buy some stummers, but I couldn't see any IC justification for a shopping trip to happen right now. with a single stummer, that's 20 minutes of silent operation, good enough for most scouting endeavours.