I'm not really a pure INT lightning bow, majorly INT though. Didn't have any problems with ghost bugs cause they're not aggro. But I did get a problem when a giant devil bug appear and suddenly got mobbed by 2 devil bugs, 1 devil bug champion and 2 ghost bug.
If your friend don't want to die, then don't run into aggro mobs and stay off places that spawn a lot of mobs, and lure them away with a single shot before the imbue as Demarthl suggested. Harmony therapy works good too. Seen some peeps do that.
I'm hunting Earth Taoist and those are surrounded by Earth Ghosts and Gun Powders... I'm surviving barely
good luck to your friend when he reaches that
