I’m dont use plasmorex, many better arks available (but if you dont have any om monsters, its a good choice)
Tbh, both are good, nilomoth and plasmorex. Plasmorex is good for heavy hitting (however it is one shorted by holy arks and a dragon and has all high tu moves) while nilo is not as good on the smash aoe side, it has risky heal and a decent single target. Its great for those without Mossgolem because it can heal strong arks such as plasmorex and may live through it. Both are viable for pvp if you don’t have better arks (namely Mossgolem and other om heavy hitters)
Now advice for kab: pvp will probabbly be pretty hard without all the om arks that those in masters have, however it is certainly possible.
Arkadions you should definately include:
Raioh (Hase, stun gift, stun skin)
Halopard (reinforce haste offering)
Possibly chopperbug (you need every advantage you can get with scramble and boldster)
Angelon (offering, strong attack, haste)
Nilomoth (risky heal)
SAPERION!
Gremknight (mainly knockback an haste)
There are many more i could include, however with your current arks, i think these would be most beneficial.
Sapherion is probabby one of the most underestimated arks currently available. Puttin him at the front of your lineup, and stego, vortexor army air trios, earth trios, and fire trios will have no effect on you.
Halopard should be before or a your most important arks, to buff them and speed them up. Angelon should be towards the end to haste your powerful arks, gremknight should be towards te front.
Placement wise, i place raioh and gremknight near the front (make sure raioh is not in first three) mainly due to the vortexor and such. Have you thought about taking a skullwraith lullaby strategy? You could use orcow to put opponents to sleep then have skullwraith come in and dreamhunt (massive damage) however without the proper setup, its pretty hard to pull off.mYbe you could try
Aoe ark
Raioh
Aoe
Orcow
Skullwraith
Then raioh could stun gift once both aoe arks are out, then orcow comes in, uses sleep gas and skullwraith uses dreamhunt. This may work, but if it doesn’t, you have stunned opponents who killed your raioh, and two strong aoe’rs to attack with.