Anyway as for SCH, your main job is 'healer' for the tank and setting up skillchains for the avatars to continue. At the end you'll see I was running scoreboard and Skillchains equated to ~ 17% of damage. Otherwise magic damage itself is awful.
When we got to Alexander you'll notice I stored TP and tried to get it back pretty often with Impact. I hit every single Shell Crusher (which was a huge shocker as a physical ws to me) and could definitely tell a marked increase of damage output from the Summoners. I did miss on Odin though, and was a bit more scared of his AOE.
YouTube Video Placeholder
-Sam