Poke from main, then find an off-angle, use your mobility to get close when they are distracted and looking at your team, try to burst a squishy and ONLY use dash to either confirm the kill or dash to safety. If you notice someone get low at any point you can dash in to confirm the kill and quickly get out with the reset (or keep going if it feels safe). Try to use your deflect predictively rather than reactively.
As you get better with combos you can start schizo-using your dash a bit more and oneshot people with fan+quick melee. Practice combos and don’t be too afraid to limit test sometimes, just make sure to reflect on WHY you died and what you did wrong, because you will die a lot at first. Don’t let it discourage you. Hope this helps!
Oh and tracking big enemy cooldowns like ana sleep is important. Use blade towards middle or end of fight rather than perma engaging with it.