Finally unlocked it!
Mode: Arena
Build: Stone of Gaia, Soul Eater, Pridwen, Hide of the Urchin, Genji's Guard, The Sledge
Tactics:
You must avoid dying or you lose all your energy and have to restart the process. Due to this fact, the build is based on sustain and protections. This is to help you stay in the fight and farm energy via his passive (Building attack speed for increased energy I found to be negligible at best). You will want to save up too 100 energy, then use Excalibur's Wrath, follow it with both 3s and a Sundering Strike.
Best target: Enemy Tanks
Worst target: Enemy Gods that have good escapes or hard CCS
Hope this helps someone else!
Also check out r/SmiteArena!