My first instinct was to alpha strike with this list blowing the boulders turn 1 on a key unit to completely annihilate it. I would play it as the Starpriest and Skink Priest giving all of their buffs (all of them) onto the Terradons, so they're +1 to hit run and shoot and charge and mortal on 6's to wound and the like. Drop the chronomatic cogs and run them across the board and dive into enemy lines turn 1 for shooting and fighting.
Lords of Space and Time the Kroxigors to charge into another unit with +3 to charge having set the constellation to +1 to run and charge.
Then perhaps throw out the skinks behind them to shoot and stand on valueable objectives especially on maps like Focal Points.
However it seems you'd send in the skinks first and foremost, and hold the terradons back for a later turn? And hold back the Kroxigors for awhile longer in fact?
Is this list not so much an alpha strike list? It seems the terradons are so delicate they'd die to a stiff breeze so might as well kamikaze them in turn 1 for maximum fun and damage to get any sort of use from them? IDK.
I love this list cuz it has everything I love: Kroxigors, Terradon models, Slanns, all the skinks (haha so cute omg i love skinks <3) and it's basically the ideal list of all the models I love and seems to be powerful enough to compete, and with minor tweaks can be a top tier list (sub some stuff for kroak, add salamanders and diff endless spells).
Is Seraphon not an aggro turn 1 smash army but more of a finesse wait and see kind of set up a trap like "hey come get my skinks!" and they're like "lol thanks for the free kill nerd" and charge in and delete them and then you're like "Psych now I charge you with kroxigors and terradons gg" ?