A question about terminology: I've always used "spoilerons" for spoilers that can work independently (i.e. one wing at a time), as a substitute (or enhancement) for ailerons, as on the P-61. That kind of spoileron is used for roll control, not dumping lift. Here, people seem to be using it to refer to ailerons that can be set so both go up at the same time, letting the ailerons act as spoilers. Is there another term for this last thing, or are we stuck with using "spoileron" to mean two very different things?

(On the merits of the OP's question, I agree with everyone else: beginners have no business using either. The most common beginner landing mistake is coming in too high, then diving to get down to the field. To be sure, without more information we can only guess about what the problem is here.)