Typhlosion doesn't get U-Turn.
The absolute best set for Typhlosion, IMO, is the Scarf/Specs set, with Eruption/Fire Blast (or Flamethrower)/Focus Punch/HP-Grass or Ice.
Focus Blast is balls, honestly. I ran one for awhile in UU with Focus Blast and it didn't do shit to Chansey (and obviously less to Blissey). Switch in on something with a fire weak and watch as Blissey or Heatran is demolished on the switch by Focus Punch.
Fire Blast or Flmethrower is obviously the preference of power vs. accuracy, but technically, Fire Blast has better damage output. 95x100= 9500 vs 85x120 = 10,200 so yeah. Blaze Fire Blast also fucks up just about everything.
Sub Punch with a pinch berry (Salac, Petaya, or Leichi) works fairly well, also. Sub/Focus Punch/EQ/Fire Blast. Not bad once you get into the red. Infernape or Blaziken does this better, though.