I personally like the fishing / wc ones, just to make screw around skillers. I'd maybe get the aviansies one and use it on your main, if you're not to worried about it getting banned.
Not necessarily true. GDK bots only make around 300k a hour + combat exp. A planker, with the balloon routes can average 400k-500k/hr depending on the G.E. (tested manually, made around 500k/hr) which also depends on if you can use spottier capes, boots of lightness ect to do more logs through the balloon routes. With the autofruitspro from rsbots.net I can make around 400k a hour though G.E. is going up and down with those but also slowly trains summoning so happy about that ^_^