Actually I mixed it up equally in both games, but in DmC you can also play very limited but be effective as well. Most of my play-through in DmC was rebellion rebellion, axe from a demon dodge. Hell I used arbiter a lot because it breaks enemy guards. Also you can spam guns on any enemy to break their guard as well (which I feel is broken). I rarely used the scythe unless I felt like getting fancy with air combos or was fighting a specific enemy for it. I think the Aquilla will be more helpful than Osiris in terms of bringing enemies in, but imo Osiris as it is, is only useful for pulling enemies up into the air.
Also in MGR you can mix up those combos with the command inputs as well (like the force push, or trip more or launcher), and I found myself doing that a lot. I think you'll use more combs later in the game when you aren't fighting grunt enemies especially when they will be parrying your moves more, etc. Plus a recent preview I read talked about fighting tons of enemies at a time which is a relief considering in three sections of the demo you fought a smaller amount of enemies.