what is IH? you mean IT?
almost every JP player likes to fight with IT
bacause IT will give them much exp (3000-4000 an hour)
you said "they cowardly took only non-linked NPC"
but they arent "cowardly" but brave
they dont like to fight with weak mobs
there is nothin to tell to them i think
cuz you arent the member of their party
if you want them to do your tactics
go ahead and make a party for lvling with JP players
and try to suggest yours