It wouldn't be a complete waste of time, bro. You'll gain some good strength and add some lbs quickly. Dbol is great stuff and would be awesome for powerlifting. It would work better with test and your cycle for sure but hey, its going to do something on it's own and will improve and I imagine you'll come out a little heavier than having not run it. Have some fun with it. I'd keep the dose at 30mg and see how you respond. You can run a little adex to control estrogen and have some nolvadex on hand, in case you notice gyno signs. 

Then when you start your test cycle down the road, you will have some good experience with dbol and know how you respond. You can use it in that cycle as a kick start for the first 4-6 wks. Then you'll see the difference between a dbol only cycle vs a Test/Dbol cycle....and you'll never want to run orals only again haha