Look's like you want to stay five attack, so I wont talk about it.
Strength, Make 60 your primary goal, as that's the level you can use Obby Maul at. I would recommend training at Al Kharid warriors, or cockroach drones, or even monks.
Range, MAKE SURE you get Range up! Rune knives, with an obby maul for the KO REALLY pays off! It also gives you extra hit points, which are quite useful(;
Prayer - I would recommend you stay ONE prayer, 31, is blah..
Magic, Might as well train it, won't really affect you much, unless you decide to get prayer. If you get prayer, get 82 magic for Ice Blitz (70 Atleast for Ice Burst). Ancient Magik's will really help you out, especially if you Blitz + Rune Knives + Obby Maul KO.
Good luck ;D