Well, a big problem is that it's online, and therefore much harder to IB. Lambda's parsers are very easy to punish before or after you block it. I know it's online, but it's very important to punish Lambda's parsers. IB her B parser, punish with 5a. You can punish her C parser with 5b or 236a before it hits you. Also, don't be afraid to punish Lambda when she's pressuring you up close. If she does a TK crescent upclose, and you predict it, you can 5b her out of it into an air combo. 6a is still a very good antiair vs Lambda. 5b also works as an antiair, if you want a faster antiair that's less atrocious on whiff.
Vs spike chaser, there's not much to do >_<. If, for example, Lambda does 3c>spike chaser, you're going to have to block it. If Lambda charges spike chaser from across the screen, you can use lobelia+wind to hit her. But be careful, because spike chaser becomes guaranteed after a certain time, so even if you do hit Lambda, it could hit you if it became guaranteed. If you just want to cancel it out, you can use a lobelia or pumpkin, but pumpkin disappears on clash with spike chaser >_>.
I noticed you started the rebels off by sitting and blocking, which is good. In neutral situations, the best thing to do is sit and block. Blocked D swords never hurt anyone. Avoid getting your primers reduced, cause its very easy for Lambda to guard break Rachel, especially with max range crescent saber, which is unpunishable when blocked. Try to get the Lambda to anticipate a winded approach and whiff 6d or 2d. Then you can wind in and approach.
If you're ever at the far edge of the screen, that's the time to use j236b, or summoning pumpkin and whatnot. Try and bait and avoid Lambda's 4D from the far edge of the screen; on whiff, it has ~57 frames of recovery >_> so you have tons of time to wind in and punish.
I also noticed you kinda lost your corner pressure on Lambda when you did 3c>george. Don't be afraid to be upclose to Lambda on Lambda's wakeup, because her DP is ~22 frames startup. You could try: 3c>george>5b, outside of Lambda's DP range. Lambda can't do anything vs that, except jumping. Also, try not to use too much wind to get in or avoid things, because that wind is needed when you get Lambda in combos, or in the corner.
EDIT: to save wind, aka windless pressure, you could use your cool trick, the sword iris feint one. I tested it out vs my friend who plays Lambda, actually, and it's good to use vs her.
