You can modify your posts, you know.
I am not sure if you know that, in the current edition, it is possible (apart from Wizards) to take magical items without having the option of the mundane equivalent (like a shield). So, the WH could take the ES. I am not saying he should, but if he would, you can use the Dragonhelm with a mundane shield for the BSB. Be aware that the Ruby Ring of Ruin will have the KB special rule (but not the Sniper special rule) against the primary quarry of the WH. A Brace of Pistols is indeed so mandatory for a WH, that I forgot to mention it.
There is not much point in giving the ME Light Armour (unless you have 1 pt to spare).
16 Archers in one unit is a bit superfluous. Better to have 10 as a Wizard Bunker and another 5 as chaff.