Undying mind is awesome for people that actually enjoy playing, im not sure why it gets hate as a strike. Maybe if your trying to speed run you hate a longer strike coming up, but as a playable strike its a ton of fun. Echo chamber is fun, its not hard yet people quit it constantly like it is, and it can be done super quickly. The are different variations of it, but honestly its a cool strike that has added mechanics (incredibly easy ones) and another strike is always good.