Because it's not particularly convenient ?

Here you check the runes that you have (and maybe also uncheck items and sockets you do not) and you can immediately see what runewords are available. Especially nice when you drop a brand new rune !

I was wondering whether there was anything like the Rune Tool for Eastern Sun for Median XL ?

My bad, I'm blind, it says "Attack / Spell / Buff / Passive / Upgrade / ..? - " right at the beginning of the description...

So, this says Spells... does it work on Melee spells like Bladestorm too ?

Hi !

Mooncall can also be used with scepters (! ), even though they aren't mentioned :