1. A-Spear - ok if u wanna be a pure Int because of passive and higher dmg.
B-Bow - this work's better for hybs, specially with the 70:70 (look for the guide in this forum)
2. A-Hybrid - well u said that u prefer a Int, so is good if go with bow or spear, but with spear the dmg is lower (than pure Int)
B-Pure int - well i said, the higher dmg in game with spear (also works with sword, but u want spear

). Th e only problem is the low Hp although spear passive helps. I don't recommend u a bow pure Int.
3. Which skills should I NOT get? - ok:
Spear: (PURE INT)
Heuksal - 60 (lol, i know, but a pure int needs mag over phy attacks)
Lightning - 80
Fire - 80
Cold - 80
(HYBRID)
Heuksal - 80
Fire - 80
Lightning - 80
Cold - 60
Bow(PURE INT)
Pacheon - 80
Cold - 80
Lightning - 80
Fire - 60
(HYBRID)
Pachen - 80
Fire - 80
Lightning - 80
Cold - 60
4. A-Garment (great mag def and 20% less of mp in using skils, if u wanna go pure int, useless)
B-Protector (good in mag and phy def, if u wanna go pure or hyb will be ok, although doesn't look as good as Garment)
5. Which skills SHOULD I get?
Pure Int/Spear:
Hybrid Int/Spear:(u must choose ur imbue)
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PureInt/Bow: (Ice as imbue--recommended--)
Hybrid Int/Bow: ( i recommend u 70:70, look for the guide!! --fire as imbue)
6. Additional opinions
play, play and play till ur head fall off.
I hope that this help u, but remmember that the last desicion is urs.