bhu, before I put a response to your post up there. Those minion skeletons are going to keep coming back. So even if you do kill it, if you don't move away it will come back this rounds on it's turn and attack again. You may want to use a move action and either shift or move and take an AoO from the other which even if it did hit would not kill you plus you would activate your Shadow Walk again giving you concealment.
Riskier would be to leave those two skeletons up, move away (taking two AoOs which will drop you if both hit), and make an attack against the minion skeleton near Shandien like Inspectre is suggesting.
Tanthalus may want to use his Healer's Mercy Channel Divinity soon, it wont help Dunor, but it will help everyone else who is bloodied (Tulugaq, Shandien, and himself), including healing the boy (NPCs do have 1 Healing Surge for purposes such as these).