General

Omg I love you guys! My zero is 179 and i've been trying to muster up the will to train it that last level (would take me forever on normal ToT)
so going to try kritias now ^.^

The mobs give a lot exp themselves, so you don't actually have to clear it for the majority of the EXP.
Also, the mobs will die to Instakill!
Level 140 nub running around hardmode hitting 21m was fun. lol

Easy mode gives you 100k per kill and Hard mode gives you 300k per kill. However it's recommended that you reach Level 180 if you're thinking about doing Hard mode since they have a ton of HP. The average time it will take to finish hard mode dungeon is 6-8 minutes. Easy mode would probably take you less than ~5.

I recommend you to use those daily x2 EXP buffs with you and grind them. I had nearly two million EXP because of world x2 exp and daily exp buff. Oh and try to use those cash shop x2 EXP as well so that stack up to x6.

kinda wish Nexon released dungeons like Zero for the other classes too...with high rewarding experience but at least with a bit more challenging monsters.

for people who didnt invest in a 2x quest xp coupon.

It gives several times more exp compared to the dungeons in the hub towns in mirror world. However, the mobs have A LOT of HP and the final boss casts DAMAGE REFLECT (which is literally one hit KO). But if u can handle these, ur golden.

Gives a good 20% on 1x

Better experience and WP.