For me, crunching WCG or folding or even mining, I always had one thing in mind, efficiency.
To me, there's no point screaming the CPU to within an inch of its life if temps, volts etc. are all so high that they are nearly hitting the limits (as an example). So whilst I was mining, I'd underclock, undervolt and I'd turn a 1200w heater into a 700w heater which used to give me 85% ish I think of what 1200w would give me (might be slightly less I don't think it matters so much for the example) so the system was doing what it needed too and I was saving money whilst doing it.
Same for me applies to WCG or FAH. Turn down the power, let it crunch away happily at lower speeds, have the temps chilled and still feel great about the fact your doing good for hopefully someone, some day
It's how I do it and I don't think it has harmed me just yet
I think I'm not far from yourself with the voltages etc, I'm running 1.1vcore (I think??!) and it's sitting around the 4GHz mark, which works for me, perfectly fine
If I was able to get it to run faster with 1v I would, that was just trickling the power at 160w, where I think now, I'm a little over 200w but the points per day have increased somewhat
Even having solar panels, I make sure things run efficiently as they can
