For the first idea, I recommend some very rough wrestling, maybe some lifting holds like the Argentine backbreaker rack (torture rack for short).

For the third idea, I have no suggestions except that excessive body bulging via cock or cum is extremely hot and you should totally go through with it.

I have thought about a moment of impact pic where she's slamming someone's back over her knee

Or how about a really brutal bearhug on a smaller partner?

Potentially. I've also thought of her slamming her foot down, toes only, onto someone's back or chest as well

Oh, yes. Amazing, all three...

I will say that dialogue enhances the hell out of scenes like that when it's adding depth to the character's emotions or motives or alludes to the context of the scene in question.

Any ideas let you could suggest?

Dialogue can turn a scene into a story, is the idea. For example:

1) Halulu deriving a perverse enjoyment of the damage she wreaks upon her opponent, above and beyond the simple thrill of battle, outing her as a sadist. Or perhaps alluding to the reason she's fighting, e.g. he owes her money, she's out for revenge, she was bored and that person's face looked extra-punchable, she's actually in the process of foreplay, etc.

2) Similarly, the dialogue could reveal the obliterating stompage to be the aftermath of a casual disagreement, or perhaps again she was simply feeling frisky, or maybe there's some deeper reason. Or perhaps the dialogue could shape the future of the moment in time captured here, e.g. she's about to actually put pressure down and erase her hapless prey completely. Stuff like that.

3) There are all sorts of things you can explain in dialogue about sex that you need not show explicitly. The usual "i'm not done yet or "that was just pre" or any of an endless variety of taunts, insults, exclamations of exultation in her rupturing her victim... y'know. Dirty talk. Further, it could allude to how they set up their 'appointment'. Maybe they lost a bet, maybe they were the closest thing to her when she got the need to relieve herself, maybe she intends to burst them completely, maybe they're coming back home to be a reusable condom. So on.

I more meant other poses or scene suggestions but the dialogue ideas are certainly awesome and interesting

Well, thank you. I appreciate it.

Hm... depends on what all you're into.

I rather like the idea of her hand(s) around someone's throat and keeping them held in front of her while she breaks their legs with a breathtaking insertion. Or maybe just a pic of what happens just after a session like that, her brief partner discarded on the floor in a puddle of fluids, hips and spine clearly broken; Halulu walking away without a second thought, shaft still half-hard and drooling, searching for a replacement 'toy', as the first one broke too early for true satisfaction (or maybe she just needs more than one orgasm to take care of business~).

Or pelvis shattering thrusts. Halulu is more likely to want to break a 9 foot or 10 foot muscle bound behemoth than a think or skinny waif. She likes showing big folks, (though not as big as her 15 foot self) that their size means nothing and there is always someone bigger.

Ooh, I quite like that notion. I like growy big comparison-y stuff pretty much any way I can take it~

Now the Question Is Who Would draw it

I very much like the third idea. Belly bulges and lots of swollen bulgyness is awesome