Investing in rune items could be a decent investment but that would be better off saved until closer to the PvP update, buying ess and making nats is ok but it would be better if you had 91, getting rc gloves and training it up could go pretty fast if you were willing to spend the 2 mill on ess then you would have 91 rc and you could sell the runes to buy ess to make nats at 2x.