A few odd tips for prompt crafting: you can test prompts quickly using the DDIM sampler even at low steps, it may not be the prettiest but should let you quickly check if it is generating what you want and tune the prompt before you use higher iterations or a slower sampler

The reason I have sword flash in a lot of my negatives is because this LORA sometimes confuses neck blood splatter and sword flashes, resulting in them being placed where you do not need them/ putting white lines where you do not want them around the neck, if you have that issue doing the same may solve it.

doubling edge size (512 - 1024 for instance) quadruples the amount of work, if things are going slow in testing "halfing" resolution will SIGNIFICANTLY increase speed

in many cases (especially if you are trying for a very specific look to your image and need to go through a lot of iterations, doing the above and just upscaling the result or using a "nearly there" result and using a little tweaking/img2img work may get you there faster than just letting 100 renders of the maximum resolution and quality you can run so you can find that one that is just perfect

Try different models, and LORAS a lot are available here: https://civitai.com/ and can change the style of an image totally, below is a quick prompt using a realistic model:

Positive: RAW photo, 1girl, photograph, (female police officer:1.1), kneeling, bra, <lora:0iggb5:1.2> , solo, kneeling on road , seiza , arms behind back , beautiful day, (head_flying:1.4),(severed_head:1.4),(decapitation:1.4),(neck_spray:1.4), (high detailed skin:1.2), (blood splatter:1.1), 8k uhd, dslr, soft lighting, high quality, film grain, Fujifilm XT3
Negative prompt: (worst quality:1.2), (low quality:1.2), (lowres:1.1), (monochrome:1.1), (weapon_trail:1.4)(greyscale),blurry,easynegative,bad anatomy,cencored,moasic,low quality,worst quality,bisexual,futa,futanari,insert,missing hand,missing arm,missing leg,missing foot,low quality, worst quality,ugly,fused fingers, extra fingers, extra toes,malformed hands, mutated hands,mutated fingers, mosaic censoring, (weapon_trail:1.4)
Steps: 40, Sampler: DPM2 a Karras, CFG scale: 6, Seed: 1412703140, Face restoration: CodeFormer, Size: 512x512, Model hash: f93e6a50ac, Model: uberRealisticPornMerge_urpmv13
https://civitai.com/models/2661/uber-realistic-porn-merge-urpm

Now this one could do with a little tuning but tinkering and finding out may get you some fun results.