My Nord warrior keeps getting eaten alive by archers.  He tries to dodge and use cover but he's a bit slow in all his heavy gear.  True I do use a mod that makes combat a lot more deadly, takes 3 to 5 arrows to take him down.  I've also got another mod that makes it so NPC archers don't always hit.  Charging down a dungeon corridor or over open ground, as is sometime necessary, gets him killed quickly.  Which I suppose is realistic in as much as a fantasy game can be.  But when he can't catch up to his enemies fast enough to engage in melee it gets a little frustrating.
Any tips on how to deal with these threats?  He has some marksman but not much, he's only 6th level.  Does blocking with a shield help vs arrows?
As mentioned playing on a modded PC install.
Thanks