I'm a stroker too, aim for the second mark too.
I wouldn't buy the Fight. Tore Torgersen (the PSO I go to) has heard bad rumors about the ball, from his pba friends. Like that pba bowler from Finland.
I'm sure tose guys know what they're talking about.
If I had to make an arsenal out of anything other than heavy oil balls (I don't bowl in tournaments, just league bowling, and very rarely the oil machine breaks).
Motiv: Jackal or Jackal Carnage (I'm happy with the Jackal on fresh heavy oil and medium) - Froza(medium) - Venom Panic - Ascent Pearl (red/black because it looks coolest out of the Ascents, they're all the same except the color)
Columbia 300: Swerve (tried it out on burned oil, hooked a lot)(it'll hook a lot on fresh heavy oil too with my style) - Delirium shock or Severe Delirium (medium) - Scout/R - Tiger's Eye (light)
Hammer: Scandal (hooks a lot, more than what the Swerve did) - Dark Legend - Arson High Flare Solid or Viral Solid (light)
Roto Grip: Menace - Devour - Loco Pearl
900 Global: Dream Big(heavy) - Dark Matter(medium) - Boh-Yah(light)
And for those that I'm not sure about, just know which heavy oil ball I'd buy from them if I could buy any ball I wanted and had space for many balls
Storm: Alpha Crux. Oh and Hy-road for medium oil, burn. And Ride for light oil.
Ebonite: Warrior Elite - Game Breaker 2(because others say it's good for medium-light oil). Cyclone for light or desert. I've seen the Cyclone on medium oil, it hooked a bit, so I'm guessing it would be a good choice for when there's barelly any oil out there.
Radical: Guru Master
Track: Paradox
Brunswick: Ultimate Nirvana
DV8: Grudge
Though if the PSO you go to is good, he should be able to put together a good arsenal for you.
Just mention that you want one for heavy oil, one for medium, one for light and maybe one for when there's no oil out there.