Need help choosing lightcone for Rin.

I finally pulled Rin after trying for 151 times (Yipee!!). I got her because I saw that she's the next best support for Archer if I don't have Sparkle. I'm also 49 pulls away from getting to choose Archers signature light cone. So is it worth it to save up jades and try and get both rin and archers lightcones or should I just save up for whatever character drops next patch?

I'm also a completely free to play account and a complete newbie, only have been playing for one and half months now and I'm in the middle of penacony if that matters.