Riftstalker gameplay is all about getting those buffs up quickly and not letting them drop, but it's really hard to track the remaining duration on Rift Guard and Guarded Steel when I have to spot those two icons among the many buffs I usually have active. I've read that some Riftstalkers use third-party programs (like Chronos) to track those buff durations. Adding them to the Class Mechanics is, in my opinion, an easy and elegant way to fix this problem.