You will need to farm a fair amount of cacti to keep up with the amount of cactus blocks you are going to need for the tools and armor in this mod.
DesertCraft allows you to make a tools and a full suit of armor using cactus blocks. The armor has a similar protection to leather and the cactus tools have a similar durability to wood tools. The Cactus Chestplate can be enchanted with the Thorns enchantment. The recipe is shown below
8 x Cactus = 1 x Chestplate