You could start here:
https://chicken-dinner.com/5e/5e-po...mp;9&4&4&4&4&4&4Choosing Wood Elf gives you stealth, movement buff, dark vision, and elvish resists.
Adopt two-weapon fighting as your fighting style (full damage on off hand finesse attacks). (Attacks x2)
Pick up Eldritch Knight at level 3. (with the Intelligence 18 crown, you are a competent caster)
Level 5 (attacks x3)
levels 4 and 6 boost Dexterity to 20 for max damage and AC
Levels 8 and 12 boost constitution for max health and Concentration saving throws.
Level 11 (attacks x4)
Level 13 You can cast haste for 5 attacks and have + 10 to concentration saving throws to maintain haste.
Did we forget to mention Action Surge?
Bonus: now you can read up on the Eldritch Knight goodies that give you spells + melee combos.
Advantage: Backstabs are gone in patch 5 (probably because enemies never missed the opportunity to exploit them, and could wipe out parties fast). I will reserve judgement here, as it is off topic.
You can use magic to knock things prone or create other advantage opportunities.
When the game launches we should have a barbarian companion option. Having one in the party with Totem of the Wolf would be your best friend to fight beside. (persistent advantage)