I need a good monster to train on in runescape. PLEASE HELP.?

Here is what i have as far as armor and weapons: dragon med helm,dragon chain, dragon pl8 legs,dragon boots,rol,row,aog. weapons:saradomin sword,whip,torags hammers (100). i have 71 attk, 71 str (30k to 72),70 def,43 prayer. i want to level up my str to about 75 then attk to 75 ,then my def. i have been training on lessers (FAIL) . PLEASE I WANT ALL THE INFO I CAN GET.