SOC Commander Pairing - Pls Help!

Hey all, I’m in a dilemma here and just asking for a second opinion. I just recent EXP GG on top of Achilles. So my first cav march is going to be obviously GG/Achiles on my delta set.

Now for secondary I have two options: Huo/Arthur on existing wedge set OR Arthur/Willian I by converting the wedge set to another delta ( I have William I EXP and I have the stones needed for converting).

Which one would you choose?

P.S I fear a conversion from wedge to delta will be needed in the future anyways since Huo is finished and the next Cav commander will most likely complement Arthur. Also I do have Attila and Joan available too…

Thanks!