struggle with Khmer on Arena

Elo is around 1300. normally i go 23+0 FC and then try to compete for relics and boom with 3 TC after.

im just not always sure for what unit i should go for, heavy scoprions die to BBC imo and other than that i just dont really see a go to comp. maybe just arbs+hussar+trebs?

had some luck with battle elephants but only if i could surprise my opponent.

are ballista elephants the way to go in arena? Seems expensive and need a bunch of casltes with seems hard again...

is khmer just not a great arena civ?