For arena, you have few options, none of which are amazing. You don't have a 30% speed lead, so winning the speed race is going to take a bit more effort than normal. Your best bet for arena is probably something like:

Gorgorab Lead

Maneater

Stag Knight

Ithos

You need Gorg to win the speed race, and you need Maneater to be fast enough to go right after the Gorg. The other two don't matter as much - just make sure Stag has enough acc to land his DEF down, and Ithos should be able to clean up.

For Dragon 20:

Gorg

Kimi

Vogoth (may not be necessary - if Gorg can keep your team alive, drop Vogoth and replace with anyone else)

Alek

Skullcrown