[Help] Best season which downgrade

[TheRenchix]

Hello.
Which is the best season which can downgrade to old version?
Old versions like 97p, 97j.

Where is
Added Sets

Mythos (MG)(Vulcano
Baphomet (BK)(Dragon knight
Chaos (SM)(Venom mist
Licantropus (MgSM)(Sunlite
Cobra (ME)(Sylfdray

Added weapons:

Mythos sword (MG)(Explosion blade
Steel emperor blade (BK)(Bone blade
Malibu staff (SM)(Viper staff
Stalker Scepter (BKMG)(Soley Scepter)

And maps like
Lorencia
Noria
Davias
Stadium
Icarus
Dungeon
Dungeon3
Lostower 1-7
Atlans
Aida
DareDevil
Crystal Quest
Exile
Old Kalima
Chaos castle
Quest room