If it were me, I'd set INT at 8 or even 7, and put those points into PER. That would synergize well with the skills you consider most important. You could buy the INT implant to get one of those points back, and a round or two of Intense Training could get the rest of them back for you.

You got a point, but I'll get these skills higher with INT than with PER. Also planning on using ED-E.
I'm only getting PER this high for the Better Criticals perk, otherwise it'd be down there with CHA.

I agree. I'd put a couple more points into perception and get the intelligence implant if I really wanted it higher.

If you picked up the implant and took Intense Training early, you really wouldn't lose that many overall skill points. With Luck at 8, you should be able to wipe out the Atomic Wrangler quickly and have enough caps to scoot over to the clinic and get the INT implant very early in the game, especially if you try to make it to the Strip right out of Goodsprings.

WRT to your second question, yes, by the time you get near Level 50 with that kind of an EW build, you're going to pretty much roflstomp anything that comes your way, especially if you're using weapons like the Holorifle and the Sprtel-Wood 9700 as your workhorses, and especially if you're playing on Normal diffuclty. I played an EW specialist with one of my previous characters, and he was able to one-shot Rawr in Lonesome Road with a sneak critical from the Holorifle.

But to what end? What good is there in high PE and a few perk slots spent on Intense Training?

If I'm already using ED-E I don't need PE for detection. If I'm already getting a lot of skill points per level I don't really need any other stat to be high just for the sake of skills (I would need high SPECIAL for other derivative stats, ofc).

I did a quick spread sheet your setup.

It looks like you can get those 7 skills up to 90 by level 30 ( tagging 3 of them at the start, dumping all skill points into them, and evening them out as you go). The others are ~20 and below. This is not counting skill books you get.

If you go without Logan's Loophole you'll have everything maxed out easy.

Edit: I'm guessing you'll have more fun with LL, since you seem to worried about being OPed.

To expand on the above post, with the Comprehension perk, you could cap those skills at 80 and rely on skill magazines if you need to take one higher to do something, and then spread those 70 points you saved into other skills. Pick up the Voracious Reader perk at Level 22, and you can craft all the magazines you'll ever need at a workbench.