I have not done Woodcutting to a high enough level yet for magics/yews but I did just achieve 99 fishing with Czar's script. I know that you will be making 100k+/hr at higher fishing levels while only getting 12k xp. To get to around 80-90 fishing you can probably do it in 60hrs from level 1. But in case you don't know cooking atm is great profit. If you buy raw sharks and cook them then you can be making about 300k-400k gp/hr. It is about the same as Wyverns because of all the botting that has been going on. But.. you would need a higher cooking level. If you have the gp, just buy out as many raw sharks as you can.
But.. fishing right now doesn't seem profitable 2 many bots in every skill. Honestly it is up to you.
Runecrafting is huuge profit. At level 50 I think you make an easy 500k/hr+ but also has a high ban rate.
Czar Motherload I am doing right now and making about 75k gp/hr at level 66 mining. I saw on reddit if you get mining to 99 at motherload you make about 72mil, but that is in the long run.