FairFamily

That Aegislash gets +1 in Attack by its Magical Seed. Using its free King's Shield, it Swords Dances, which is field boosted and gives another +3 in Attack. Then, it uses priority Shadow Sneak and the field-boosted Stance Change gives it another +1. It is pretty much a free win for Titania. The only way I've found to defeat it is Sucker Punch it or get one of your mons to +6 Defense when you can (e.g. vs Alolan Sandslash) with Iron Defense or something and proceed to sweep (praying that it will be able to live one Shadow Sneak).

I know that fields are made to give unfair advantages to Gym Leaders, but this is a bit TOO over the top. +5 Attack before having the chance to attack Aegislash is ridiculous.

technically you can will-o-wisp/haze or you can change the field before the switch but it is so much advantage for a such a powerfull pokemon. I don't mind the lapras since it is not such a great mon anymore so the advantage from the field feels fairer.  Titania has a problem where basically her team just becomes irrelevant before the threat that is that aegislash.