Artifact Dilema

[Sonofaliche]

My circumstance:

I'm a level 20 warrior just aquired the Demoness as my bride. I married her due to my abundace of good weapons; poisen dagger, whip, gladior sword, dragonslayer sword, equilibrium sword(sword of light), Axe, Hammer, etc...
My current army setup; Emerald Dragon, Hunter, Sprites, Dryads, Inquistors, Elves and lake Faires in reserve.
With my new wife I only have access to only 2 artifact slots and have 4 good ones, two that have great synergy. My artifacts are as follows: Agna's Ruby(must have), Death Skull (equiped), telescopic sight and Ale barrow?
Question for the vetrens would you swap out the Death skull for the Telescopic Sight? Or just swap when both archers are in the army at the same time? Or sell the scope and keep the +5 from the skull always?
I really appreciate this site and all who have contributed there knowledge in helping us enjoy this great diamond in the rough! Can't wait for Armored Princess!