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I honestly don't think those guards will help your riding personally
They're more for the bike's sake as opposed to mine, the alu 'backbone' feels a lot more solid than the all plastic ones they replaced. Good spot, I tilted my levers down before the event to help reduce wrist pain, and follow the line of my arms when standing. May have gone a bit over the top though!
jambon-
Fair enough I can't stand the ones over the end of the bars just because they are restrictive. They do save levers though.
Bit too high is way better than a bit too low. In that position you have way less bar grip as you are more likely to roll your hand over the top of the bar when braking hard or hitting bit bumps/impacts puts loads of pressure on the thumb as well. You should be over the back of the bike on the faster rougher stuff making it harder to reach down to the lever when it lower.
Not criticising you have to do what feels comfy but its worth mixing it up sometimes. Look at the likes of the pro riders and try not to deviate too far from their setups. Tommy Searle did a good bike setup/technique video not too long ago.
Tom13
You you will build up strength. It's forearm mainly which helps reduce arm pump I feel. That's why I like the rowning machine. Doing manly classic mx and trials plus a fair bit of MTB as well.
I honestly don't think those guards will help your riding personally but I'm happy to be proved wrong. Also on the pic before if may be the angle but your levers look really low.