there is no need to start with 10 PE you can go with 8 or even 6 if you will.
8 PE makes sense only if you are going to use cigarrettes to buff it up to 10 later. 1 point of perception is worth 48 skill points invested into tagged SG (above 200% level), 1 point of intelligence gives you 40 sp, so whenever you are going to go over 200% of a gun skill, it's better to reduce INT and increase PE.
6 PE is not a sniper dude

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and dying in two burst ...at range or point blank ?
At range, I usually have a metal armor.
..you can have 200 hp as sniper
Post this build, since I don't believe you can make a good sniper with 200 hp (not talking about energy gunner here).
...and if he gets close you can eat psycho - per wont penalty you here
Not everyone has a doctor alt

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... At top of that you should have FA that heals you for full amount - and you can have 150+ FA
Only when you resign from outdoorsman or reduce PE, whch , as I explained before, is a bad choice for this type of build.
Basically you can have either 148hp or 172 hp (when PE at 8 ) as a sniper. And it's equal to 2 minigun bursts :-P
EDIT: And even if I somehow managed to make a second shot, it's about 40% chance to knockout a target (according to the above discussed formula) - still hardly fair, and it doesn't usually happen. Snipers don't need more nerfing.