Oh, also, let me add a thing about Loki's powers. Kind of cause the whole constantine has better imagination thing.

Basically, Loki has to parcel out brain power for every bit of the illusion he makes. The relatively simple ones take very little brain power and the complex ones take a lot. But his brain power is still shared over his other cognitive functions so if he wants something big and complex, he might stop moving or looking and in battle, if he wants to fight with his illusions, he has to keep it relatively simple. But the brain power also applies to things he imagines so making things he imagines is harder than doing things that are simple, such as his clones. This pretty much rules out big imagined monsters for normal combat and restricts their use to prepared distractions and stuff. Also takes more concentration to induce hallucination-like effects and stuff.