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First of all get a socket in your weapon that is more important than the highest possible dps, you should also get sockets in your chest and legs. This will give you 1100 more strength if you put in 220 str gems. You should also switch out the passive renewal with wrathful since that is a better healing passive. Your critical hit chance also seems pretty low so getting that on gloves, bracers, amulet and rings should also be a priority.

There should be no difficulty in getting rares and rerolling them to farm t1 easily. I started farming t1 the instant I dinged 70 with rares I found on the way and had no problems doing it. Just make sure you take advantage of the mystic to reroll stats on near perfect rares and you should be farming t1 in no time. The only difference in drops from master to t1 is class specific set items only drop in torment 1 or higher.