In a tourney i would probably just hit the combos over and over in between stacking light cycle and quorra, following up with disc battle. My preffered combos/eols being:
1. Quorra shot, right ramp, then scoop (low eol combo score but can hit it over and over)
2. Right ramp, left loop (2way combo, again, low score but can hit over and over)
3. left ramp, left loop (slight nudge to get a clean flow without hitting pops), quorra, left ramp, then scoop (medium eol score and 4way combo)
4. Right loop, right ramp, right loop, right ramp, rinse and repeat (most i ever got is 6 way combo doing this, huge eol score)
You can also get huge points in light cycle multiball fairly easy. I just hit the left ramp, then left loop with the first ball (for the super jackpot) and try to hit the right loop, left ramp then quorra with the other ball (from left flipper in cradle position) for the double super jackpot. Unfortunately, im not a pinball playing god so i cant hit that most of the time, but the need to constantly keep trying it is my main drive to play this thing.
Quorra multi you can also get huge points, but stick with the first two balls if you can without adding the rest via the recogniser (add a ball feature) as it will only create chaos on the playfield with all 4 balls flying about.
Now, playing the game to get to portal i stick with this:
1. Drop recogniser to open up gem, then repeatedly go for gem until i have it started (and lit if possible)
2. Repeatedly go for quorra until lit, then either stack that with light cycle or play as standalone multi.
Do these two modes first and the rest will follow easy enough to start Sea of simulation once you have all the modes lit. Gem is the hardest, then quorra. The more you shoot them, the easier it becomes to hit consistently.
Of course you need the mode lights lit as solid and not flashing otherwise you will be doing them again in sos.
Just the way i play my machine, even though there are multiple ways to achieve the same goal, this is what i stick with. Highest score on my pro 135mill. only ever got to portal once. Try many times daily and start off getting around 10-15mil. An hour later 30-40mil, two hours later in tearing my hair out at 50-70mil screaming the house down and severly damaging my pleasant reputation in my neighbourhood.
Tron is pure adrenalin in a box. End of line.