First of all, excuse me for my english if there is any grammar errors.
So, for this achievement, you need to unlock
. This character has several items, like the Map and the Compass. These items will help you to find rapidly the exit to the next floor.
But first, you will need to purchase or find items that can boost your soul power or/and your totem power. Keep your soul orb for boss. And don't be afraid to use your totem, the cooldown is reset after every rooms.
During boss fight, use the
's soul orb to stop the time, and use your totem near the boss (or anywhere if you find the Hive Totem). This will do a good amount of damage. Repeat if necessary or if you are low in health or near to death.
For this achievement, I used Hive Totem and the stop time totem, with equipment that boost totem power and soul power. It took me less than 20min.