Speed Run Pack Concepts

I want to make a pack which main goal is to defeat all the bosses the modpack has to offer, the trick is I want this to be painfully hard, as hard as i can make it in fact. Here is my list:

-Enviromine
-Deadly World
-Zombie Awareness
-Lycranites Mobs
-Hardcore Ender Expansion
-Tinkers Construct
-Iguana Tweaks
-Metallurgy
-Nether Ores
-Hunger OverHaul
-Special Mobs
-Chocoalate Quest
-Hardcore Questing Mode

Any comments and/or suggestions are much appreciated