Need advise on stakeing pure

[Iherbs07]

hi i have a account with 60 att (all quested mm done) 80 str, 1 def, 73 hp, 70 range, 15 prayer, 55 mage combat level 65.

Question: is this good for stakeing or should i get 90str, 45 def, 70 att what would win me the most money in duel arena.