I was late to the whole Eureka thing but I started it on Sept 7th and got the whole thing done in 7 weeks including Pagos weapon and Anemos armor for my WM main.
Is it time consuming, mind numbing, and a bit tedious? Yes it is if you don't like that type of game play, but that's the way this content is compared to the rest of the game, and it will be that way for a while. If it's not for you, it's not for you, just be resigned you are not getting the relic this time or wait till it's made MUCH easier and then do it for the glamour.
Pagos right now is in no way dead. At server peak times that place is hopping with people, heck, I was in there on Faerie at 2 pm EST and there were 122 people in the instance. If you are not seeing anyone, you must have gone in on your server's off times.
Also, Pagos is NOT worth it if you are under 25, it's just not. NO one will group with you and you can't get anything done. At 25 you can at least have the first teleporter to get to the lower level fates in time if you camp out at the crystal. It's not until 30 and you have access to the first upper crystal that you really begin to get somewhere in Pagos. Yeah, it sucks, poor design and all that, but that is the way it is and it ain't going to change.
The way to do it, level up in Anemos and use log exp to get to 25. Once there, try to get that REALLY nice fate exp in Pagos from the lower fates which will speed your way to 30 faster, then start participating in the upper fates, (30 to 32 goes fast), and before you know it, you will be 35. By then you will probably have most of your Pagos crystals and a fair amount of light. Then just grind for the rest till you have your weapon if you want it.