The scale looks good, but the skill itself is not really that good imo, I got it on one of my chars, I started it with Lv 5 and using it even with Sleep don’t do that much tbh, then I lowered to 1 just for utility (the suction effect) and put points elsewhere. Missile Hole seem more for PvP, but in PvM, depending on what you are facing, it may save you. But if you think it is more worth put in Blink or leave in Dimension Compression is up to you.
For Firework effect i’m not sure from what it comes the damage, my guess would be from FB, since the fragments come out of it, PP is not bad, but in all honestly, I don’t find it all that good as a stand alone skill. It’s just my opinion tho.
I like Swap for the same utility Earthquake provide, you can move a good amount of mob inside some skill/trap with it, or even overlure mob inside your or someone else AoEs.
In Sage I always get 1 point in the Shop because it help out with other chars, I used it to do the flowers part from Nak Muay unlock quest.
About Flare, my issue with it is that it didn’t hit the mobs in flame depending on the direction you where facing or distance or even if you where with the burning monster in the aim. As I said, not sure if they fixed that, so I can’t tell you it’s usefulness, but since now it does have a nice scale, if it work as it should then could be one hell of a finisher.