During the meta of jade juju spammers, bad juju became an exploited card like any other spells that can be spammed, death was notorious not just because of juju itself but because their ability to gain pips using empowers essentially being able to spam over and over again. Now essentially speaking this strategy only works around high resist or low damage gears and some of it was implemented into shadow attack strategy.
Now for one to use this spell they have to sacrifice -25% of their hp for a none damaging type spell that consumes 3 pips. Mean while gets a way with efreet that cost them 4 (power pips) which everyone gets at max level. Not only does it do damage but puts a -90% weakness on the opponent. If one could argue one would state the major difference between the spells are the damage it inflicts and pip value, but for one to justify this argument one what clearly state juju doesn't do damage meanwhile efreet does. Now am not trying to bring back the juju meta but something has to be done even if it means to change it to some kind of poison damage spell that leaves a maybe 35% weakness on the opponent(PVP) only while keeping the 90% in pve active? I just feel the value of this spell has shifted because of the amount of hp your deducted from using this spell and what really bothers me even more Storm and Death are the only 2 schools that have Backlashes from their own schools spells like insane bolt and rasulkas wrath +30% or -30% percent (bonus or penalty) mean while death takes damage for using their own spells like juju, empower and Sacrifice etc.
gets a way with efreet that cost them 4 (power pips) which everyone gets at max level. Not only does it do damage but puts a -90% weakness on the opponent. If one could argue one would state the major difference between the spells are the damage it inflicts and pip value, but for one to justify this argument one what clearly state juju doesn't do damage meanwhile efreet does. Now am not trying to bring back the juju meta but something has to be done even if it means to change it to some kind of poison damage spell that leaves a maybe 35% weakness on the opponent(PVP) only while keeping the 90% in pve active? I just feel the value of this spell has shifted because of the amount of hp your deducted from using this spell and what really bothers me even more 
Storm and 
Death are the only 2 schools that have Backlashes from their own schools spells like insane bolt and rasulkas wrath +30% or -30% percent (bonus or penalty) mean while death takes damage for using their own spells like juju, empower and Sacrifice etc.