>>96317919
Because they don't do recon, they're fire support platforms that carry Calivers or heavy flamers and follow Veletaris in buildings

They might be the only good caliver platform in the game actually. Imagine spending 18 points on a TSS marine with a Caliver when you could strap one on a fucking sentinel instead for 20.

The Hermes does more damage of course but the gulf in durability between SAV3+ and SAV4+ is immense.