No, it’s likely not possible. Doing a 5 sec eccentric pretty significantly reduces the amount of weight you can lift in a near-max effort. In fact, even 3 normal reps (e.g. a 2010 tempo) would be VERY hard, if not impossible, at 95%. Don’t forget that unracking the weight takes energy and as such, a 3 reps cluster is often just as hard as 3 normal reps not done as a cluster.
And I’m not even talking about multiple sets… at a true 95%, you will not be able to do it. Heck, you likely will not get one set. And you’d need at least 5 min to remove all the residual fatigue just to MAYBE have a chance at completing the second set.
Can and should are two different things. You CAN do clusters for as long as you like, you will not die or implode. But I find that using clusters for more than 4 weeks can backfire, especially with near-max clusters.
Not with a slow tempo. And not everyone will be able to do that with “normal” reps either. I’ve seen people who are VERY fast-twitch dominant OR very strong, not be able to do high % clusters with more weight than if they did normal sets.