i've had some free time for the last few months, so i got a bunch of mousepads.
and of all of them, this is the best one i've ever owned:
https://lamzu.com/collections/lamzu-energon/products/lamzu-energon-mouse-pad
my only wish is for it to be in deskmat size, but this is worth the tradeoff. it's comparable in size to any XL artisan pad anyway, which is fine for most setups.
this is the only cloth pad i've tried that does not benefit in any way from an arm sleeve. most cloth pads require a careful consideration of their stitching angles in order to find a compatible cloth sleeve that doesn't add additional friction to the X and/or Y axes. unlike every other mouse pad i own, you don't even need to worry about a sleeve. with about 3 weeks of heavy usage, this has not degraded out of the box with sweaty palm + arm contact; it does not get muddier as intense play sessions continue. with that said, if you do need to use an arm sleeve for some other reason, i haven't found any that works well with it (including turning them all inside-out).
the lamzu energon is, in every way, a better artisan raiden (mid; didn't try the softs).
compared to the raiden:
it has better XY symmetry (raiden has slightly more Y friction than X; this has slightly less than the raiden -- i usually play with my mouse pad vertically rather than horizontally for any vertical aim scenarios, like tf2 or tile frenzy/gridshot stuff, and while both do well vertically, this manages to be just a bit more comfortable);
the raiden has some sort of powdered coating that wears off & adds a muddied feeling during a play session, which causes my arm to stick to it slightly & the initial friction of my mouse skates, glass & ptfe, to stick a bit more. i haven't replicated that feeling on the energon mousepad yet.
it has slightly more discreet edge stitching than the raiden, which means there's no real bump on the edge of your arm that lightly irritates me. this is namely true when using the mousepad horizontally, but it is slightly better vertically than the raiden too.
very low static & dynamic friction with any skates. it works great with ptfe, glass, and sapphire.
this basically does everything i wanted glass pads to do; it provides a fast glide without feeling like my arm sticks to the surface. the only pads i've used that are "faster" are the artisan shidenkai & the fnatic jet, but they both have some significant downsides.
the shidenkai has a glass coating which wears out pretty quickly, and then it basically degrades to a soft hien with all of its XY/friction tradeoffs.
the fnatic jet is really cool, but it muddies very badly if you sweat, and its glass skate support is poor. it also barely works with a few mouse sleeves, with specific cloth stitching & material structure; all the mouse sleeves i have add friction. the only way you could really justify it is if you don't sweat, or if you use a deltahub carpio g2.0 or a flashe gaming glove/sleeve to ensure purely ptfe contact on the pad.
some other mousepads i do not recommend:
xraypad's thor (a worse version of the fnatic jet)
xraypad's aqua speed (poor XY symmetry, better arm feel than the artisan hien but very poor arm sleeve support so it is hard to manage the added friction)
skypad 2.0/3.0 (if you live in a clean room &/or neurotically keep your glass pad clean at all times, it has slightly less static friction than the energon/raiden/jet with more dynamic friction -- otherwise, the scratchy feeling of ptfe skates hitting against any dust/debris/skin oils/hair makes it virtually unusable)
some other mousepads that i like/have justifiable tradeoffs:
artisan hayate otsu (my previous favorite mousepad; more static & much more dynamic friction, amazing XY symmetry & skin feel, and manageable arm sleeve support)
artisan raiden (more expensive & worse version of the lamzu, but great pad all around -- similarly very poor support for arm sleeves as the energon)
odin infinity v2 2xl mousepad (basically a deskpad artisan hien with a slightly better arm feel, but still a bit scratchy/"pokey" out of the box)
artisan hien (poor XY symmetry, but good control & good arm sleeve support by virtue of easily identifiable XY stitching -- irritates my arm otherwise, so very very weakly recommend)
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even though my glass pad experience has been very poor, i'm still interested in the following if anyone's adventurous enough or, by coincidence, has tried them & could share their experiences:
https://www.machinaultima.com/
they supposedly can texture their glass with varying degrees of friction, to mimic an equivalent cloth experience.