If you are intent on staying hota/rend than I suggest just keep saving. You need to get more IAS, and lacuni's might be worth looking into in the future. it'll also put you at 24 MS. As for now...
Switch Warcry out for Overpower Crushing advance, you'll have a huge EHP jump. I also think a vit gem in your helm will help. But with 5m I'm going to have to say switching out those depth diggers for rare pants if 5m is your budget. You are REALLY lacking vitality and you can pick some of that up with rare pants.
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