what do you do after stun locking the rogue? i really don't understand your rogue guide since i can't seem to meaningfully damage her at all. i run out of vine units before she even hits half health
Once the vine stun duration is upgraded enough, you should only need to spawn about 1 vine per second to keep her stun locked. Then spawn in lots of damage dealing units while she remains stunned and keep her stun locked until her health is low enough to capture. If you've upgraded both your vine stun time and your unit capacity, this should be pretty trivially easy.