[@Archangel89] Gotchya! Yeah, like I said, do what you want. My example was merely the more min-max version. Let me think about this... Hmmm. So, the Fighter is the dip, but the Bladesong still needs Leather armor to be effective... You sounded like you wanted WIS to not get any lower, and CON can't really afford much change, especially since DEX is about to get ganked...

Alright, from the top with all 13's, Mountain dwarf for a chonky +2 CON and +2 STR.
We frisk CHA and leave INT as 18 base, since the Bladesong AC and CON save bonus depends on it.
3 points from WIS to raise STR, DEX and CON all to 14. Dwarf bonus raises STR & CON to 16.

STR - 16
DEX - 14
CON - 16
INT - 18
WIS - 10
CHA - 8

HP: 25 (taking average hp, accounting for Fighter d10)
AC: 13 (light armor)/ 17 (with Bladesong)
+5 to hit with weapon, +5 to damage (with dueling)

This is the best I've got for yeh, unless you plan to drop anything else to bump up STR.
Another option, if you don't care about preparing too many spells, is to switch DEX and INT, so that your AC can be more reliable at all times, but it will cost you with your Bladesong AC and CON save bonus.

Also, Sigil allows us to start with extra gear (within reason) to represent us being Level 3 adventurers, so be sure to ask about starting with Studded Leather armor for an extra +1 AC bump.