Lol, or, you could beat Son of Sun the emulator way... Save state, and if you pick the wrong flame, reload your state until you do!
The first time I played through on emulation and did this i SOOO felt like I was cheating (which really, it is).
Never found that fight hard really. Even on 1st-time through. Once I saw it was 99% fire attacks (just that "beam" isn't) I just put red mail and vest on, then something with high magic-resistance on the 3rd member (didn't have prism dress at the time, so maybe I just had a guy with high health/resistance) and just did it. 1st time w/o all 3 having "red" armour was hardest, but definitely possible, and not "omg that's SOOO hard".