@SammyLinkAndZelda

Vah Medoh and Vah Ruta are the easier ones, and Vah Rudania is slightly more difficult, while Vah Naboris has one of the hardest parts of the game to just get to the actual dungeon, and its boss fight is rather difficult.

As for arrows, normal Arrows would do fine, although using Ancient Arrows is optional for lots of damage to the boss. As for the Guardian Scouts, you can use any weapon to fight them. If you want slightly extra damage, just use Guardian or Ancient weapons.

If you're really struggling, the Master Sword is another option, as it does double damage to the bosses.

Go for Ruta it makes the game more fun and progress in a circle after than ebding with Naboris

I did naboris first and it was a mistake, I would go for ruta for it's easy location,

Ruta is pretty good for starting, if your having trouble getting shock arrows gerudo village sells them for not much

Ancient bow and ancient arrows for the sentries outside rudania and same for fireblight ganon u can 3 hit him in the eye that way

Ruta first but if u have ancient bow and arrows (10) then rudania u can 3 hit him in the eye with them

Zora

I would do Vah Medoh first. Because if you do not have proper items and skill the waterblight Ganon is difficult. But it can also depend on your skill level. Because if you consider yourself ready for a challenge as a beginner or wanting to just complete it as someone who plays well.

vah ruta was my first one

First I go to Naboris. Yeah, it is hard. Way to the Ruta is very hard, then you should fight with Linol. The easiest one is Medoh(Rito)