EG is sorta like ortega except when you complete a face you orient both orientation and permutation. There are three sets of Eg.
CLL (which i use), Eg-1 when ou have a adajectent swap and EG-2 when you have a diagonal swap. Makes it around 120 Algorithms (40alg per set)
Theres really no point on learning EG-2 when you can just do R2 F2 R2 after you have completed the first layer and then do CLL. Or you could learn Anti-CLL then Complete the opposite CLL to force a Diagonal swap on the top then do R2 F2 R2. Eg-1 is very beneficial but EG-2 is a waste of time.