For VoWG lunatic... I have a few suggestions (or options, I should say)
1. Play as Marisa C, put 4 frost throwers on the boss (by bombing), end the card in 30 seconds - before walls come.
2. Practice the heck out of VoWG. Unlock stage 6 practice if you haven't already (watching a replay will unlock it for you). Practice until you can dodge walls reliably. Because... if you can dodge VoWG, you can enter stage 6 with 0 lives and still beat it. I know I did it twice (Marisa C and Reimu B - granted they, esp Marisa C, end the card faster than others, but still).
3. Get there with 4 lives or more - you might lose all of them if you aren't good at VoWG, so #2 is still the better option.
As to things that might help you:
- There are 2 phases of VoWG - "nice" phase and "wall" phase
- On lunatic, "wall" phase starts after 30s (hard mode - 50s) - so unless you are Marisa C, you will have to face it.
- You can go through all blue and teal walls, but beware of dying to another wall right after.
- You can macrododge most of the walls, but sometimes macrododge involves going through extremely small gaps in addition to swinging unfocused around stuff, so in that case you might just want to stay put and micro through a wall.
- Bomb immediately if you ever get pushed to the corner (unless you have played it enough to know how to get back without dying)
- Try timing it out during stage practice - 150s of that spell each time will help you get good at wall dodging, etc
Mind Stopper
All I can say is make sure you get up to the middle rather quickly, after you make the dodge at the bottom.
I'm sure you know the method of staying in the middle, when bullets blur out, go to near the bottom to the right of the bullets in the middle, dodge those bullets, then dodge bullets above you as you go up.
Maybe others have some better pointers.