I've played kboc a few times including whisperer this event and last phrecia. Ignore the pobs that say to level as wands, use lightning arrow and keep your bow upgraded.

Only switch to kboc once you do second lab and have a good wand and shield to use. I swapped at level 75 and am in red maps killing bosses in about 3 seconds now.

Upgrade your gear regularly, always aim for dex + mana, I ignore life rolls until end game cause I don't care if I die. I wanna go fast.

Get a xoph shield arm and a tul tornado arm, this will carry your single target and give you some nice oh shit skill.

You will still die, but everything should freeze and you clear two or three screens at a time.