Enter the maximum stats of the monsters in each area... you can get them from FallenswordGuide.com or FSG [alt link if the first one is down]
You can find the stats you need to achieve this using Rubicksman's Best tool... I find it to work like a charm :) Link RubicksMan's Best Item tool!
NOTE: You only need to have either the required defense OR armor, and then both the attack and damage. :)
Suggest additions or give feedback [here]
Hope this helps you get setups to kill monsters... ~DarkArchon
Other resources
EXP gain calculator [note: currently does not accurately work for levels below 150].
Calculate group stats with just your stats and 3 mercenaries.
Brief explaination of my hell forge suggestion, which got added, and a calculator to show the bonuses an item would get with this system.
Monster's Attack Monster's Defense Monster's Armor Monster's Damage Monster's HP Quick Select Stats
Goal number of hits Active DC buff level Active SES buff level Active HF buff level Active Const. buff level Active Sanct. buff level
Player's Attack
Player's Defense [with buffs]
Player's Defense [buff bonus (+x)]
Player's Defense [after Constitution]
Player's Armor [with buffs]
Player's Armor [buff bonus (+x)]
Player's Armor [after Sanctuary]
Player's Damage [with buffs]
Player's Damage [buff bonus (+x)]
Player's Damage [vs. undead]
Player's HP
Player's Required Attack
Player's Required Defense
Player's Required Armor
Player's Required Damage
Player's Required Damage to 1 hit with BT
Player's Required Damage to 1 hit with PS
Player's Required Damage to 1 hit with BT & PS
Player's Required Damage to 1 hit with SA
Player's Required HP
Estimated no. of hits [normal combat]
Estimated no. of hits [after wither]

Target Defense Value Constitution Level Defense [bonus (+x)] Required Base Defense
Target Armor Value Sanctuary Level Armor [bonus (+x)] Required Base Armor
Target Damage Value Holy Flame Level Damage [bonus (+x)] Required Base Damage