1. CI and RC can miss right? that means I will be needing lots of dex?
Yes, they both miss. I have 60 Base Dex and 60 Base Luck (Luck has hit bonus too, I think) and I still miss on mobs even lower leveled mobs like Raydric. Not all the time though.
2. Do I need some int? will 1 int support massive RC spam?
No need to pump Int, unless you have 2 stat points left when you reach level 150
I use a +4 RWH with Willow card, and pair it with +4 Nidhogg Garb for my SP problems, barely runs out of SP, and pairing both equips with an Earth Deleter armor, I'm not running out of SP at all. Specially if you're mobbing alot of mobs for RC.
3. I see people selling Chakram with FS enchants, what's the purpose for FS on it since it seems to me that it's a crit build katar no?
I think some people like to have FS enchants (instead of Sharp maybe?) on their Chakram for more damage. +9 Sapha Set with Crit Enchants gives tremendous amount of Crit, even if the set is not complete (no rings and garment for example). RT gives 10 Crit too which is huge.
...or maybe they are just lazy to switch gears and use the same weapon for RC. I hope not!
4. What's a good but not expensive weapon for leveling? I have a glorious bloody roar, however it doesn't seem too good for none humaniod creatures.
Agree with others with an upgraded Wild Beast Claw. Chakram if you have alot of zenny to spend, specially with Aunoe card's price is low now due to mid TI, if you're going to crit.
Thanks
You're welcome.