Yes. But it depends. Spoilerons "spoil" the airflow over the wing, though only at the trailing edge, giving you less lift, higher wing loading and effectively lowering the main wing's angle of attack. Less lift brings you in steeper . . . but less angle of attack brings you in faster. If you have a good, low idle then they are helpful. If you can't slow down the model BEFORE deploying them they may not be a good alternative. Gliders, with glide ratio out the giggie, use them for landing.

An Edge? You have enough control throw to Harrier in, and a lower pitched prop would be a better solution to slow a landing.