Entrance randomization adds a whole new level of exploration. It breaks down into Entrance, Floor, and Town Shuffling. All forms of Entrance Shuffling Require NPC Item Shuffle to be enabled. Without shuffling NPCs the world map would be fairly restricted anyway. Therefore, to enforce the high degree of variety this feature is designed to create, NPC Item Shuffle is required for Entrance Shuffle.
Additionally, when Princess Sara is rescued following the initial battle with Garland, the party is not teleported along with her to Coneria Castle. With the entrances shuffled it might not be possible for the party to get back to the Temple of Fiends entrance where they may have parked their boat or ship! Even if it would be possible, for the sake of consistency, that teleport is disabled.
Remember, Entrance Shuffle creates an new focus on exploration! One needs to realize that the quest items may now come out of order, because all dungeons might have different requirements to be accessed. The CHIME might just lead to an unimportant Cardia cave, while the eastern entrance to the Titan's Tunnel may be the Sea Shrine.
Onrac is considered a town, so Entrance Shuffle does not move it. However, its entrance to the Sea Shrine is considered an entrance, so the OXYALE is required to gain access to whereever it leads. Note this may be a meaningless destination like an empty Cardia cave, or it may be something as important as the Temple of Fiends.
Of course this means things like the CUBE and ROD might not be required. The room after the Vampire might just be a dead end in Cardia; the CUBE might just lead to the Ice Cave Pit Room with an unimportant treasure at the end, for example. With floor shuffle almost anything is possible!
Regardless of how all of the fiends and Temple of Fiends are accessed, the entire game will always be made available. In other words: all of the floors, treaures, bosses, and items will be available somewhere. You may not need the CUBE to beat the game, but it nevertheless gets placed in a chest or NPC, depending on your flags, waiting to be found.
LUTE CROWN CRYSTAL HERB KEY TNT ADAMANT SLAB RUBY ROD FLOATER CHIME TAIL CUBE BOTTLE OXYALE SHIP CANOE AIRSHIP BRIDGE CANAL
It is important to note that this scaling is applied at the end of each battle and is recalculated each time, thus applying its bonus appropriate as it changes. It stacks with the standard EXP / Gold bonus.These are the modes: