Keep away can work in your favor, since he's likely pushing himself to the corner. Slide should basically get you in for free, no matter what rocket he's using. Try to use it more preemptively if he's punishing you. If he's too predictable with his rockets, use MB ice blast and take the trade.
After blocking Triborgs pokes, it's basically your turn. Throw an f4 xx clone instead of a poke of your own and wait to see what he does. This is the spine of SZ's game plan in general. Keep in mind that his 1114 and f43 are both +2, but they have gaps as well. Respect the follow up, or hit the gap with MB frost bomb.
As far as Triborg's neutral goes, SZ's d4 should absolutely dominate. Get familiar with his pokes and space a little more carefully. You can duck and punish his only mid string and low profile almost everything else. After d4 hits, take the +19f it gives you and pressure him with run b12 or f33. If he tries anything but block, you'll hit him.
Once he's cornered behind clone, wait for him to make a move. If he air dashes or teleports, punish and put him back in the corner. If he jumps, slam him with b2 on the way down. If he blocks, run up and throw him into the clone.
With such a powerful low poke and the ability to move around zoning, SZ shouldn't have so much trouble with this MU. Play smart and you'll exhaust his options quickly.
