What about a nice Lk build, I just started making an Baby knight and i need him to pwn

Go for LK. Baby classes suck even harder on SHRs due to HP modifiers.
Focus on STR, do not max it. 800-900 seems enough depending on how much +STR you can get from equipments.
Pump dex until you can get enough hit to 95% hit assassins. 400-500 should suffice depending on how concentration skill works on your server.
Get agi for max ASPD, use a berserk pot. Even 5 less agi points count. If you prefer to be more ready to get dispelled, ditch the berserk potion.
Pump VIT to a decent rate. Not as high as STR but it should definitively be higher than DEX. You'll make out the most of LK's HP modifier.
1 int, 1 luk.
Get as many kiels as you can, the usual tanking gear and a good damage spear.
Buff yourself, BB the crap out of anyone alive. End.