On Pure Int spear does most dmg, but s/s gives you BR and nukes don't crit. So on hyb. you should go spear and on pure int grind and lvl with spear and pvp with s/s.
Ok, now easy explanation:
A pure int has less hp (health points) then other builds. So you should use spear for lvling, because it does more dmg (damage) and you will lvl faster. When you want to pvp (player vs player) you should use s/*s (sword and shield), because s/s gives you BR /block ratio from shield), which allows you to block attacks.
On a hybrid you should go for spear always, because with a ratio of 1:2 str:int, you will have enough hp to survive and spear does more dmg and helps you more then s/s
Now which you will choose is your decision, check out this post for the best guides and there you can read which build you like better
http://www.silkroadforums.com/viewtopic.php?t=19902
Also here is a small list of terms frequently used in SRO:
WTF - What The F**k
OMG - Oh My God
OMFG - Oh My Fu**ing God
WTB - Want to Buy
WTS - Want to Sell
WTT - Want to Trade
PWND - Same as Owned, so you got beaten up or similar
N00B - A offensive player who is cursing (if this is the right term, so frequently using f**k, bi**h, pu**y and similar) and disturbing other players and doing all other stuff that you should not do!!!
NEWB - A new player who doesn't know much about the game!!!
SOS - Seal of Star
SOM - Seal of Moon
SOSUN - Seal of Sun
SOX - Some seal
lvl - level (XD)
NPC - Non Playing Character
LOL - Laugh out Loud or Laughing out Loud
LMAO - Laughing My A** Off
ROLF - Rolling on Floor Laughing
ROLFMAO - Rolling on Floor Laughing my A** Off
PK - Player Killing
KS - Kill Steal
BTW - By The Way
BRB - Be Right Back
BBL - Be Back Later
AFK - Away From Keyboard
w00t - We Owned Other Team
k - thousand
BR - Block Ratio
ATM - At The Moment
S/S - Sword & Shield
B/S - Blade & Shield
