I pair octoneer with volcawolf… with charisma i can now OHKO 3 ark with metal slash 
then i attack with volcawolf and then use retreat to use vengeance at the end.
So I just went on a 7 win streak(in master) using this line
Scorpionix
Goldenhorn
Raioh
Vegitiger
Typhonwyrm
Gremknight
Stegospike
Minespider
Vortexor
Octoneer
Osiriswyrm
Magmawyrm
Omegawyrm
Halopard
GigarockI’m only gonna give a definition if people want it :3
I’m only gonna tell u to use strategy over strength
Used a modified approach to good effect
Shadowstalker
Triphoon
Chopperbug
Riaoh
Mossgolem
Vegitiger
Stegospike
Vortexor
Octoneer
Osriswurm
Minespider
Magmawurm
Omegawurm
Halopard
Gigarock
just ONE metal component to this lineup (what with all the anti-metal arks floating around). This makes scorpionix and octoneer not as effective as they can be. I am not worried about The Vortexor banishing my front line as there are strong arks thoughout the lineup. Went on a 10 win streak until i succumbed to my opponent having too many BA’s, but that’s to be expected. I suggest using Subzeratops instead of Goldenhorn since it nullifies Octoneer’s xeno move (also Kami’s). I dropped scorpionix since there were a lot of early Octoneer encounters, and rarely any late Octoneer encounters so I moved the minespider after the Osirus, that way its somewhat protected by its decoy, and serving a dual purpose with Octoneer’s Plague move. I liked your ending ark sequence cause its solid and effective so I kept it.
I only use Goldenhorn for his speed/passive ability.
I normally would use goldenhorn as well, however both would be viable for your lineup. Stun gift+stampede+chain slow+ more stun+vegitiger? Mass destruction ensued.
Also, using raioh, Mossgolem, vegitiger, stegospike may not work too well. If raioh dies, all you’re left with is a Mossgolem…with only a single hit move. I’d put a subzeratops there and move Mossgolem. Having stun gift, stampede, guardian/chain slow, vegitiger, stego utterly destroys opponents.