Try building a skink army with the Thunderquake starhost, or the Heavenwatch starhost

Or the shadowstrike one is also pretty great!
This will be my competetive build:
"Skinky Hurricanum
Hurricanum (can't gain save rerolls, but I can buff him with curse of fates and mythic shield)= 320
Slann Starmaster= 260 (general)
Starseer= 160
Unit of 10 skinks= 80
Unit of 10 skinks= 80
Unit of 10 skinks= 80
Thunderquake starhost= 120 (always savage)
Salamander/Razordon+handlers= 100
Bastiladon with lazer= 300
Stegadon= 260
Engine of the Gods= 240"
With the Hurricanum buffing my skinks.
Or this one with just Seraphon units:
"Skink power!
An army more similar to the army I used in my very first match.
Slann Starmaster= 260 (general)
Scar veteran with battle standard= 160
Starpriest= 100
Unit of 10 skinks= 80
Unit of 10 skinks= 80
Unit of 10 skinks= 80
Thunderquake starhost= 120 (always savage)
6 Kroxigor unit= 360
Bastiladon with lazer= 300
Stegadon= 260
Troglodon= 200
Or I can also take a second Stegadon instead of the Bastiladon, and get a Engine fo the gods"
The trick with Skinks is to have a good dino front line!