1) First I really don't recommend add VIT, because when you cast song they take HP...
I'm lvl 193 and use INT (Full)/AGI (Full) /CRT (70 something, working on it). I use Magic Sword (Laevetain) and works really good.
I really don't recommend DEX too because dex doesn't decrease the skill delay, I've tested it by myself (I added full DEX) and is a waste of points.
2) I have like 4 sets xD.
My Atk set: Laevetain (Kaiser xtal), Leather Coat UP (HP+20% xtal), Aulis Gale (HP+20% xtal) and Stone Figurine.
My Exp set: Toy Glove 2s (2 Sauro xtal), Leather Coat UP (Sauro xtal), Bunny Ears (Sauro xtal) and Dragonewt Bangle (Sauro xtal). (All is like +25% exp
)
My Drop set: Toy Gloves 2s (2 Currone xtal), Leather Coat UP (Currone xtal), Bunny Ears (Currone xtal) and Jar of Greed.
My Delay set: Violakrile (no xtal yet:/), Armor waiting for White Exelis (Gives -2s skill delay) so... Is a pain to buy a exe re up now x.x, Can't remember the name of the add... and can't remember the name of the ring too xD.
3) For Songs combos:
When I'm solo I use a lot nostalgia song for CRT a the time. And Passionate song to up my atk
.
When I'm pty with HW and BISH I use Wisdom and Dream.
When I'm pty with Ninjas or any Dps class I use Nostalgia and Passionate.
That's what I usually use.