I have only had a couple of games in TOS so far, both against the Gibbering Hordes, but both times the Rifle Corps held their own pretty well after going into glory. I haven't used them yet but the Welsh are basically built for the purpose of drawing the enemy in and then just sort of holding them there while they pummel their foes with insults and injuries. Then you can add firepower by discarding a card and letting the Rifles shoot into the melee. Or unleash Dragoons, they seem pretty scary in melee especially on a charge.
Also, it eats a lot of Tactics Tokens but you can always just disengage. Heck some units have a built in disengage on their Glory side. If I remember correctly any movement outside of movement from an order does not generate a disengage strike.