Enchanter build, and autoskills

I open this thread because i have a lot of question about the Enchanter, because they are amazing ! My first question is : If an enchanter use one equip slot with sonic boom, sonic boom will be cast like fire lance etc ?

My 2nd question is for about a build. INT/AGI/CRT/VIT. Why CRT and not DEX?

1-Because ( I think ) its better to add CRT for enchanter, for make high dmg with dia espada or sinbad, and probably slot all the gears with magic xtals like the HW?

The gears can be:

-Dia espada ( or Sinbad II ) s beelzetor 
-Dunkelheit or schwartz up slot shojo
-Im still thinking about the add gears, but horned helmet up slot fg/isu/dunkeleis can be fine.
-And for the spec eqiup I prefer Atleta ring slot mezzaluna.

2-Because, now, enchanter can use magic claw, bow, throwings and swords ! ( then i think its better to make crt dmg with a throwings and claws ( bows too ) because crt never miss, and deal high dmg. )

The build can be ( for a lvl caped 235 )  : 

256 INT

140 AGI

119 VIT

200 CRT

By the way,
Idk why the enchanter use Illness only with throwings? It dosnt work with swords ? or it make low dmg with sword ?


Well, all advices are welcome.