With only 71 raid completions, only 12 being VOG I highly doubt you've been running 6 raids every week. Why don't you realise that RNG is random not skill based in any way whatsoever?
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Been playing for littke over two months.. no need for VOG. Since I've had all 32's I've been doing crotas end on normal and hard on all three characters...and I'm also a sherpa
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So you've only been playing a little while, are you sure it's not you that's been carried and had a few lucky exotic drops?