Golgo is going to be the biggest challenge for most people but as with all these challenges how hard it is all depends on what Bungie plan for it, they're not going to make major changes so the most difficult challenge will be making it so you can't fail to capture the gaze, I can easily see tons of groups struggling to cycle through orbs as was probably intended since the 1 gaze method became the normal strategy early on.
It'll be interesting to see how much they change them up each time though, it's clearly meant as a way to throw people off their normal strategies but the WP challenge this week was way too easy given it's just how it's usually done anyway.