Barrows runs are around 2m an hour with polypore.
No. When the barrow bot came out, barrow gear was more expensive. Not to mention karil's was higher because there were no Gano, and dharok was around 6M at that time (If I remember correctly). It averaged 400-500k GP per hour. You cannot say that simply using mage increases your trips by 4 folds. Not to mention barrows gear is pretty low atm.
You would however get near 2M, more or less depending on luck, if you were maxed with a wolpertinger and have drakan's medallion (Teleports you to barrows).
There must be a quicker way
If there was a faster way wouldn't everyone do it? Or wouldn't the user that found the method rather sell it than give it to you for free?
If everyone did it, it will go down to 200-300k per hour or so. If he gave it to you, it would obviously be leaked, and not long later it goes down to 200-300k per hour as well.
There is no "easy" way as you're looking for. The fastest method is to work for it, by getting a job, and dropping the $ here.
Either look and buy a legit guide that provides a method that suits your need, or buy RSGP. People have already given you the best advice on this thread, but it isn't enough for you. It won't get any better, at least not for free.