With all of the changes that basilisk venom has undergone it is now a 1.5 stun with a 1.5 second cast time. It does still overcome defiant in pve but it doesn’t seem to warrant elite status.
My suggestion is to simply drop the casting time and change it to a 1.5 second daze and immobilize. Immobilize can be cured and daze can be improved. It seems like a fair trade off. Of course I would still like to see it overcome defiant so if it has to be split pvp and pve so be it.