I don't know if it works better in arena, but I think it's always better to have CC and PC when playing against gold.
So I'd try something like this:
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6rq 6rq 6rq 71a 71b 71d 71d 71d 71d 71f 71f 71f 71f 77e 77e 77e 77e 7dm 7dm 7dp 7dp 7dp 7dp 7dr 7dr 7dr 7q4 7q4 7q4 7q4 8pl
You can replace Soulcatcher with towers if you want. You can use rage elixir to kill an enemy creature to boost soulcatcher or to increase the atk of pharao or scarabs.
(So it's kind of a replacement of lava destroyers). In not so optimal draws, you may have to cremate a mummy to play another one to use rewind on. I also was thinking to
add another bone wall (or imp fog) replacing a SoR because imo defense is often more important than speed in arena. Now the Gemfinders are replaceable with any zero cost creature.