If you go pure mod than i would advice you to quest 40 attack with a few easy quest: waterfall, grand tree, tree gnome village, fight arena. (i would just set up the auto quester script to run for mithril gloves too, your defence and prayer should stay 1 with mithril gloves. i've done this before.
or if you dont want to quest than keep the attack lvl 1, this way you keep the option open for all the possible builds 40attackf2per/gmauler/ddser or obby mauler if 1 attack.
keep defence 1 and prayer 1, this gives people more of a choice to decide themself to train pray if they want since 1pray pure are becoming popular.
the higher you can bot range/str/mage would make the account the higher worth.