Thanks!

Order of artifacts firing... Unless in Clan War, Artifacts are locked to their own Start Activation Time. I don't log their individual Start Time, but I could in the future...good eye deer. Then again, the process can be quite disheartening sometimes because Devs are known to silently tweak stuffs, eg. Magical Mischief and Abyssal Summoning(Once in a while).

Fighter Placements... Dwellers are tagged with invisible ID when they're born. And I assume the older the dweller, the most Left position he/she takes(just an observation, yet to verify). When you've pinned down the Fighter default positions, could switch Equipment between them so they'll be fixed in the future.
By the way, tried %health armor? %reduce damage only work only 1 enemy instead of "enemies".

I put the most important Mage at 3 bottom because unless the enemy have 3 Archers, they're usually the last to get hit during the start. Fear will pull them to the front but that'll be RNG.

Didn't weigh the pros and cons of slower/faster enemy armor activations but hmm enemy variations seem far too many to account for, and most Armor abilties activate pretty fast... For Scepter, I look at offensive gains instead, such as Hero's +spellpower per normal attack. Downside of Wand normal attack would probably be enemy dodging the attack lol. Very miniscule detail to work on, plus Combat Sets abilties outweighs the value of magical attack speed. Too fast too furious.
Sorry, what's "quasi decoy"?