You're as dumb as they come. Her upg zhen gives what, 60% magic attack and 120 all stats? that's the only gear you can't get on ISEN, everything else on her you can get as well. You can easily forge a zhen on isen with more melee/magic and stats than her upgraded weapon. As for HP you can also reach 500k on isen no problem even without upgraded weapon, on max gear, 1k title etc, it's no problem