Tips on Beating Last Arena / Metalloid

Does anyone have any tips on defeating. Metalloid? I’ve tried utilizing Flamogun & Shadowlance’s “Metal Claw” but it is surprisingly ineffective vs. Metalloid. Add in the strength of the opposing attackers, and it’s a very difficult matchup. Any insight on this? Thanks!

My lineup:
Destructor
Flamogun
Magmawyrm
Shadowlance
Arkwing
Flamogun
Don Penguini
Plasmorex
Goldenhorn
Barricadus
Voltiger
Coldheart
Vulcaraptor
Stormfox
Fireheart
Georex
Leviathan
Searex
Raijin
Stegotops
Dullakhan
Raptorex
Searex
Plasmorex
Thunderback
Raijin
Pyroviper
Nilox
Skywolf
Pengboss

Use a flash bomb, timestrike combo then follow up with flamo and/or ShadowLance alongside a Barricadus (which by that point should have guardian set up)
So set up the following in this order: Stormfox, Stormfox, Anything with timestrike (Voltiger) , Barricadus, ShadowLance, Flamo (as a follow up). Barri should steer any non AOE attacks away after the opponent has recovered from double flash bomb, allowing you to survive longer with ShadowLance and Flamo.
It’s also not a bad idea to group your AOE fighters together, preferably in the middle of your lineup, which allows you to thin out enemy Arkadion quicker

Edit: Flamogun can die way too quickly, I might suggest another ShadowLance or a heavy elementless hitter

Try using scramble or knockback or use attack all to avoid getting blocked