Trish is a multi-purposed character, she can rush down and zone out (though she really benefits from assists to solidify both strategies), the key is to know what the opponents character is vulnerable to… yes Storm can out zone Trish, but that just means you have to rush her down, same goes for characters like Arthur and Dormammu. I mean, technically you could pick assists and put Trish on point to gear her towards a zoning strategy, but then it’d be like you’re missing out on half the character…
As far as zoning strategies, I like to keep mobile, in regards to traps/round trip. I like to use hopscotch as kind of a zoning barometer, a lot of people will superjump over it to avoid the upwards shot. If I’m midscreen I like to backdash and pop another Hopscotch to catch them on their way down, or just duck under them to the other side of the screen, whenever you have space to, chip away with Low Voltage and Round Trip -> Switch Sign. Experiment with different Hopscotch/Peekaboo placement patterns and see how people try to move around them…
Combo-wise, I like to use her [gound-combo],:s:,j.
,:d:+:h:,:qcb::l:,j.
,j.:h:,:h:,:qcf::l:,:qcf::atk::atk: as a way to push into the corner, where her combos are better. And I don’t even bother using air Max Voltage as a combo ender unless I’m in the corner because they tech out before she’s done midscreen (which I do think is kinda stupid).
Use assists frequently with Trish, the extra utility really helps her game, a good beam assist (EM Disruptor, Plasma Beam, Unibeam) really helps her zoning game because Low Voltage is slow on startup. Cancel her blockstrings into fly,j.:s: for a quick overhead, or unfly/divekick into a low for a mixup (and cover yourself with an assist to make it safer to do so (and more ambiguous because the assist will clutter the screen). Hopscotch and Peekaboo do their jobs as keepaway tools, but it DOES help to have a gtfo assist too (Double Lariat, Gustaff Fire, Shadow Blade). Also, Trish loves OTG assists because she has no OTG of her own…
Just experiment with her, Trish can be a really ambiguous character, but you have to work your tools and not settle into a routine or her limited moveset will become readable.
edit: Also, use her zoning/rushdown capabilities to throw the opponent off, if they manage to breach Trish’s defenses, get in there and take the fight to them (and vice versa, if your not getting any luck opening them up with rushdown, back of and start chipping them out)
Wall of text ftw lol…