No experience with the Helinox flick-lock poles, but if you special order them through REI, you can return them if you're unsatisfied, even a year or two later. I can't imagine you'd have any problems with the flick-lock design, and my experience with the twist-locks show that the poles themselves are more than durable and dependable. I tend to beat on my gear pretty bad, for example, tossing my poles off small cliffs when downclimbing, or slamming them into nooks while traversing talus fields, amongst other various atrocities... hah.
Shock absorption is a gimmick designed for people who will buy extra features due to a fear of the unknown (i.e. a groundsheet for a tent). You'll notice carbon's antishock benefits when mountain biking, but you don't need it in your trekking poles.
Fatigue from using trekking poles comes in 3 flavors:
1) hands, from gripping (not vibrations, but from overgripping, or just gripping for long durations)
2) shoulders and arms (from using them to pull yourself up terrain, not vibrations)
3) elbows and wrists (from using them to support your weight as you descend, not vibrations)
Aluminum trekking poles are not rigid solid steel columns. They have quite a bit of natural give and flex to them.
Maybe if you were an elderly person, it might have some benefit, but fatigue from vibrations is a silly idea for the typical human, drummed up by marketing departments to sell more 'stuff'.
Michael, since you're new here, I'll give you a bit of advice:
One of the tenants of lightweight backpacking is to identify 'fear of the unknowns' and understand how it causes you to add more weight and 'stuff' to your pack that you really don't need. Go light FIRST, and if you run into a problem, it's not the end of the world. Next trip, just add some more 'stuff' or weight, but ONLY if you feel like it really would have made a significant difference during your trip.
I was reading a kid's book the other day to my daughter, about Duck and Racoon going on a picnic. Duck shows up at Racoon's house and Racoon doesn't want to go. He goes through a plethora of scary 'what ifs' and concludes that going for a picnic is dangerous. Duck goes through his fun 'what ifs', and Racoon realizes that he was having a fear of the unknown. Racoon decides to go. Duck waits in the living room while Racoon gets ready. It takes forever. Racoon finally comes out of his room, loaded to the gils with all sorts of 'gear' to cover any possible scenario that would occur on a picnic.
Do NOT be Racoon!
For example, I saw your post about wanting to go with a bivy and tarp. If a fear of getting your bag wet is telling you to buy a bivy, why not try a slightly larger tarp without the bivy, first? It's less weight, less money, and you won't know if it'll work for you until you try it. Bivyless tarping works for many in some pretty bad storms.
I'm not trying to be critical, it's just that many people don't at first realize this very important tenant of lightweight backpacking: Don't bring something based on fear, bring it based on experience! I didn't realize this tenant until AFTER I had spent a lot of money on stuff I didn't need, and thought I did, all because of fears of the unknown and 'what ifs'. I only wish someone had explained this to me much earlier! It's hard to make that philosophical shift, but once you do, it's great.
Cheers and good luck!