Personally, I would high alch while fishing/wcing/mining (it doesn't interrupt skilling). If you are planning on dropping anyway, this is a good idea. Just straight up high alching is not that great of an idea since there are other ways to train magic that are much more efficient. Since you are just getting 95 prayer, it's a pretty safe bet that you can afford to train magic faster than alching. Still, you can look here: Tip.It Runescape Wiki Grimy