Runelord = 290
Runic Greatweapon w/ MRo Breaking, Ro Striking, Ro Cleaving
Runic Gromril armour w/ Ro Resistance
Runic Talisman w/ MRo Balance
What are you trying to accomplish in general with this? To me, he is easy to kill, has little offensive value, and is not awesome at anti-magic, and that is without considering this specific DE army. What is your thinking?
Your great weapon is no longer a great weapon because you put runes on it and did not include MRoKragg. Secondly, with just 2 attacks base, that very expensive runic weapon is not worth having anyway. You would do more damage spending those points on more gw warriors.
Re-rolling just a 4+ armour save is generally not worth it. He needs a shield and Rune of Stone, then the re-roll becomes valuable.
Taking a runelord with only one anti-magic rune is not good use of the runelord. You take a runelord in order to stop enemy magic, yet you have spent most of his points on other things. He should have at least one spellbreaker in addition to MRoBalance, if not more than that. If you just want MRoBalance for antimagic, stick it on a runesmith and spend the extra points elsewhere. A runesmith and a fighting Thain should be clearly more effective than this guy in all respects, even though fighting Thains besides the BSB are often a waste.
2 x 25x Warriors = 250
Greatweapons, Full command
Generally a bit small, but should be okay for 1500 against DE. Just don't get in combat with a healthy Hydra ... it will wipe them out.
10x Quarreller Rangers = 155
Greatweapons, Veteran & Musician
No real point to having the veteran. Really this unit is not going to accomplish much in this matchup. They are hugely overmatched by the volume of light enemy shooting, and they are not capable of taking out the Shades or Dark Riders. You would be much better off with an Organ Gun.
Cannon w/ Engineer = 140
Cannon w/ Engineer = 140
Illegal for the same rune on two things. Add Burning to one. With the Hydra known to be out there, really add Burning to both, and put something silly (reloading) on one to make it legal. Since you know you are facing lots of light shooting, I would keep the engineers here, although I often recommend removing them from cannons.
Grudge Thrower w/ Engineer = 120
Adding one or two Penetrating to this really really ups the damage. The extra kills from one or two Penetrating runes here will do far more shooting damage than your entire crossbow unit.
I really suggest an Organ Gun, even at the cost of removing the Stone Thrower. The Shades and Dark Riders are going to get out of your front arc and attempt to charge your war machines. At minimum they should be able to annoy you constantly, and neither cannon nor stone thrower is very good at taking them out.