>>96310199
Hermes Sentinels are less than a point per dollar. Making an all sentinel army is by far the most expensive way to play Auxillia, spamming Lasrifle tericos is far cheaper. If you can print your own sentinels you will save so much money.
Assuming you do tho Hermes squads are actually useful. Both guns are effective at what they do with the multilaser being a 36" suppression machine that does decent damage into tacticals and other W1 infantry while the grenade launcher gets to chose between a stunning frag grenade or a short ranged 2 shot autocannon. Being 18" range may seem to be a disadvantage and it is but the Hermes has Inexorable advance and can get firestorm too with the right command squad so its pretty easy to double tap with their guns at full BS.
They're also tough by Auxillia standards with T5 W2 and SAV4+ which is an absolute steal at 16ppm. The grenade launchers even cheaper relative to what you get for 21 ppm.
Plus in recon cohorts they can withdraw 5" in the enemies assault phase AND capture objectives despite being cavalry which WS can't even do.
The only thing holding Hermes sentinels back is how much money it costs to buy them lol.