Hope used to have a set called the Little Bleeder, which I think it still sells. I’ve used that and homebrew versions on older Hope brakes in the past – the old master cylinder caps for C2 brakes were excellent for that, as they had a hole in the op anyway for the adjuster.
Great for bleeding four sets of brakes halfway through a trip to the alps, as it sped things up.
If you think you have air trapped in the system, try tapping the hose, caliper, master cylinder etc *gently* with the handle of a screwdriver (or you hand, for the hose) and that usually does the trick.
As said above, if you aren’t bleeding them properly in the first place, then an air system will just help you bleed them wrong a bit faster.
Try speaking to Magura, its importers or your local bike shop. If al else fails, find a shop that has done lots of them – as with any manufacturers’s brakes, there are little tricks that help bleed them properly.