Touhou 19: Unfinished Dream of All Living Ghost - Lunatic 1cc (Reimu, No-Miss, No-Bomb, No-Hit)
1No-Hit aka No Shield Break.
The damage from Reimu's Level 2 doesn't activate until the explosion at the end, so while it clears bullets, you are still vulnerable to fast enemies ramming into you i.e. Eagle spirits. Lost a few runs that way.
Stage 1: Aunn's EX projectiles can't be cancelled with Level 2, so just be careful when you're pointblanking.
Stage 2: Nazrin's EX pendulums can spawn on you, so be careful of that whenever you leave the bottom section of the screen.
Stage 3: Can be a bit tricky when that laser spread attack that fans out from a single point shows up. That thing activates super quickly so don't get caught off guard. Marisa's EX attacks can also be threatening in general since they restrict your movement, so keep your Level 2 handy to defend yourself if necessary.
Stage 4: Suika isn't hard, but don't hesitate to Level 2 her second boss summon when it shows up. If you take too long to kill her after she declares her spell card, she turns into an invulnerable mist that you can't kill for a few seconds and can complicate things. To be safe, I also unleash a Level 2 whenever it gets crowded to instantly delete a bunch of mini Suikas. Can seem really hectic if you start trading attacks too often but it's not hard even if that happens, don't get intimidated. Your Level 2 will keep you plenty safe.
Stage 5: Really easy stage, just unleash Level 2s whenever Hisami triggers laser spam just to be safe. Her boss summon gives you plenty of opportunity to approach her easily while charging up a Level 2.
Stage 6: Hardest part of the run, I try not to push the AI too much at the start because you absolutely don't want Zanmu to release too many Level 3s in a row. Reimu's Level 2 can't cancel the spears and they take up so much space. Staying near the middle seems safest but you can still get walled sometimes. Use a Level 2 to clear out the middle if it starts getting messy in the middle of a spear barrage. Remember that killing a boss summon acts a full screen clear that even gets rid of the spears, so even if Zanmu starts tossing a ton of Level 3s over during a boss summon, don't panic and just unload Level 2 on her as usual.