The SSS dummies are awesome challenges if what you're looking for is having fun. The Dummy for AS4 was a joke in my 210 PLD, but when I purposefully equipped worse gear to get down to 200 I barely cleared it with 1 or 2 seconds left. I was able to clear AS4 on SMN on my second try, but dude, SCHOLAR. Doing the AS4 dummy on an IL 201 Scholar was like the hardest thing ever, specially because the content doesn't really teach you how to optimize healer damage. Having to know how and when to take advantage of Dissipation, taking auto-attacks into account and micromanaging the hell out of DoT placement so that they would all reach the end of the timer and still give out their total potency was bananas. I beat it after like 8 tries, with probably less than one second left.

These things are so fun :'D