Note: This is just my view as a Career Ranger.
Last Stand is great in voidwatch when you can have (near) unlimited TP from Dusty Wing/Monarchs and Temps together with Fanatics to keep yourself alive when you pull hate.
But that's not what a ranger is supposed to do, we are not going to dish out omgwtfbbq damage comparable to an equally equiped Front line job. A ranger is (and was) always used as a out of AOE range damage dealer while keeping out of the target's hate.
I've been ranger for events since way back when Rngs had to kite Kirin to Sandworm/Ixion, Odin V1/V2, Salvage, Legion (All Rooms inc Mul).
A good ranger isnt one who can dish out the most damage while MPKing everyone else (We are not talking bout VW here), it is one who can balance hate while doing damage with little to no resources on the whm to cure.
My LS runs 2 Muls (36) every week and we have a total of 4 rangers for Mul (2 Annihilator 2 Yochi). We are tasked to kill the Harpy while the DDs take on the other 3, so hate control is very important in that fight. My LS has no problems killing 4 Waves per Mul (Thats 2 Bot/Gallu).
To the OP:
You options are to either get Armageddon/WoE Gun for Wildfire (Still kicsk ***), Gandiva for Jishu (Cool looking), or if you are willing to burn 100million, Annihilator for the "hate-less" damage.
Last Stand is great for VW and Abby or if you like posting Epeen damage but ultimately it isnt that great a WS when you need to balance hate.
My 2gil worth.