I plan on increasing the amount of insulation in my attic (currently fiberglass bat) and have a question on approach.

The air handlers are in the attic (insulated ducting). The floor is completely cover with plywood (great for storage, not so great for adding insulation).

The easiest approach would be to put insulation in the rafters and create a warm attic. I can do this with propervent to maintain a cold roof. and isolate the soffit venting so it doesn't let air into the attic proper.

Is this resonable, or should I be looking at completely removing the plywood and creating a raised platform with insulation under it?