Peaceful forest and theme of geffen for me 
I have the Ragnarok OST that was sold if you baught the note headphones. I still pop it in here and there. IRO Loki Ordinatio Wasa here.
Well fk me cause i actually do like ToS soundtrack xD. Fedimian theme rebirth is kinda nice. Koru jungle twilight. I even think due solo, amusement, orsha theme is really great too. And fighting orsha final bosses with the diev something theme is pretty nice too. O diev for klai side also gives good feels when bossing
i feel like i am graduating everytime i hear this.
And also this is the map where one transcends.
I also love the music of TOS, and some of the theme songs from RO and TOS have the same composer, IIRC
My favourite, that retro feel…
edit: RO had some pretty awful songs though, there are only maybe 2 in TOS I don’t like.
This is my favorite song from RO aswell.
“Not so far away” is still my favorite piece of music from RO, even if songs like “Streamside”, “Peaceful Forest” or “Desert” have way more nostalgia ( the hours I’ve spent in Payon Forest and Morroc Desert are always a nice memory for me 
)
While we’re on the theme of Christmas…
Your new characters are all welcomed with this lovely song 
And sometimes you need a nice song to relax to while beating up monsters.
Good old Ragnarok music… It sure left a big impact for me too.