I guess Warlock is the only charakter within the european race which could be hybritized. About how much and so on, i guess you wont find a real answer here, some will tell you that a Full Int is the only one to go, and others tell you to go 10:1 or 9:1 Hybrid .. you know, everyones char is for themselves the best build and choice
My suggestion here is to listen to xMadeia, cause he played a Warlock to the higher lvls (if not even to cap) and his advice to go Full int till 100, and add no stats the last 10 Lvls to 110 .. i mean you should party to 110 anyway, either being Cleric or Debuffer, and you can still decide if you want more HP, or MP and Damage ..
One more thing i wanna add here is, that even if you have 9:1 or 10:1 Hybritized Warlock, you will be still vulnerable to Physical attacks and criticals will still give you always a hard time .. and if someone kills you in Pvp few times, then either he got more skill or (in most cases) he put more gold/silk into his char and that why he wins ..
My last words .. have fun on way to 100/110, cause the fun should be always the most important part