Perun
Mushroom
I don't know whether this has been covered before, and if it has, I appologise. I just had to share 
A player in our group has made a Slayer to replace his shaman character in our Dark Sun game, now at 2nd level.
In short, he made a human slayer (with a gladiator theme, but that's more or less irrelevant), he made Dex his highest stat (20, after racial modifier), and took Melee Training (Dex) and Master at Arms as his 1st-level feats (Surprising Charge [Martial Power] is his 2nd-lvl choice).
His attack is now +11 vs. AC, and he deals 2d6+8 damage (brutal 1) on a regular, unmodified melee basic attack. Which is better than any Str/Dex combination could achieve.
Even better, at 8th level, when his Dex increases to 22, his damage automatically increases by 2 points. He also has a good AC (unsurprisingly) and a decent number of hp (Con 14). About the only area where this character "suffers" is his Athletics check.
A character with Str 18 and Dex 16 ends up worse in the attack & damage department -- at 2nd level, such a character would attack at +10, and his damage would be identical to the all-Dex slayer. A Str 20/Dex 14 character could gain the same attack & damage values as the all-Dex slayer, but would have lower hp and AC.
I find it interesting that a single feat (Melee Training [Dex]) can have so great influence on a character class. I wouldn't call this slayer overpowered, but the fact that a character so modified can out-perform the basic, original version of the class (or, in this case, a build) clearly suggests that it wasn't a planned result.

A player in our group has made a Slayer to replace his shaman character in our Dark Sun game, now at 2nd level.
In short, he made a human slayer (with a gladiator theme, but that's more or less irrelevant), he made Dex his highest stat (20, after racial modifier), and took Melee Training (Dex) and Master at Arms as his 1st-level feats (Surprising Charge [Martial Power] is his 2nd-lvl choice).
His attack is now +11 vs. AC, and he deals 2d6+8 damage (brutal 1) on a regular, unmodified melee basic attack. Which is better than any Str/Dex combination could achieve.
Even better, at 8th level, when his Dex increases to 22, his damage automatically increases by 2 points. He also has a good AC (unsurprisingly) and a decent number of hp (Con 14). About the only area where this character "suffers" is his Athletics check.
A character with Str 18 and Dex 16 ends up worse in the attack & damage department -- at 2nd level, such a character would attack at +10, and his damage would be identical to the all-Dex slayer. A Str 20/Dex 14 character could gain the same attack & damage values as the all-Dex slayer, but would have lower hp and AC.
I find it interesting that a single feat (Melee Training [Dex]) can have so great influence on a character class. I wouldn't call this slayer overpowered, but the fact that a character so modified can out-perform the basic, original version of the class (or, in this case, a build) clearly suggests that it wasn't a planned result.