I don't play Riven a lot, but knowing from experience as a support main, I thought that you should get stun first instead of shielding because that lets your ADC jump on them. I just want to know if it's the most beneficial to take Future's Market? I never found it the most useful rune on a support because you don't exactly make a lot of gold. That's what's the hardest because it only gives you a tiny bit of breathing room to get a lead on the opposing support champion.