So I've found Lex can actually trade evenly with Raven at most distances. Unless of course I'm not able to properly emulate how fast a Raven player can actually throw out projectiles, but I took alot of care in making sure this actually would represent a real situation.
Her soul crush is punishable by Corps Charge UNLESS you block it from 100% maximum distance. For the other 99% of that distance, it is punishable.
At full screen, she only has that high hitting projectile. You can duck under it, and do lance blast immediately after, which leads to this scenario:
If Lex ducks under a projectile, he can get out a lance blast. He will automatically get hit by the next projectile immediately after. However, she cannot follow up that second projectile with a third. Lance blast is much slower, so it only gets to her by the time she would be throwing out the third projectile. If she attempts to throw out a third projectile, the Lance blast will hit her out of the startup. This gives Lex a free probe, or shields. If she doesn't throw out a third projectile, and blocks the lance blast instead, Lex STILL gets a free probe or shields.
It's complicated, but here's the timeline:
1) Raven throws out a projectile at full screen
(these next two things occur at the same time)
2) Lex ducks under the projectile and does a lance blast
2) Raven throws another projectile
3)Raven's projectile hits Lex and does 8 % damage
4) Lex's Lance blast reaches Raven. If she tries throwing out another projectile, it is stuffed on startup, and Lex gets a free probe or shields. If she blocks, Lex still can get out free shields or a probe. (Lance blast is around -12 at point-blank range, but at full-screen it is +infinity due to Lex recovering while it travels)
So in that scenario, Lex takes 8 percent damage from a Raven projectile. For Raven, she will take 1.88% chip from the lance blast, and Lex gets a free probe or shields. The probe is ideal, because she'll then have to dodge orbital strikes.