No athames in 1.5.2.Make an Athame and go Enderman hunting, slay the Ender Dragon so you can murder them in your home...
Plenty of options. Ender Pearls aren't the hardest thing in the world to get.
MFR also now has it's answer to Soul Shards in more recent versions which even supports mod-added mobs, so that can be used in place of Soul Shards.
Getting to the end requires ~12 ender pearls to start with.
MFR requires you to kill more mobs than you spawn.
Edit: Autarchic gates also require 21 laser-minutes to craft. Each.