Honestly ranger is not bad at phys damage either though.
I mean, it's definitely better than the north/northwest ascendancies, but compared to a Glad it's massively behind the curve. As long as you're going physical, there's not much choice, when considering the utility Glad gets you. Hell, you can even forego the 20% AS/MS (Arena Challenger) and go for Blood in the Eyes for Maim on hit
and Blind on hit, which gives retarded evade for no investment whatsoever besides the ascendancy point. In many cases, that would leave you with ~70% phys reduction, 75/75 block chance, ~50% evade, with some basic flasks and over 5.5k life, with recovery on hit. Take Vaal's with a basic 0.4% phys damage leeched and you can face tank ridiculous shit.
Raider is better for elemental, no argument there, but elemental FS screams for a multi-cluster set-up on a Raider. You get exposure for free, but your ele damage nodes are too far away to consider, since you're doubling down on Frenzy charges and need the southern axis nodes.
Bang for buck, I'd go something like Raider with a Terminus Est (5-10c for a 5-link, 2 ex for a 6-link a few days into the league) for clearing white/yellow maps. For red and bossing, investment will be needed.
You want corpse removal bc. porcupine&co
If you're going down the Glad path with the massive block, health on block and phys damage reduction, you probably don't, outside of very, very specific circumstances. I've done 100% delirious T15-16s on this build with porcupine spawns and barely got touched. Lvl 20 Simulacrums are no issue.