How easy should sets feel & when do you increase weight?

I've heard Boris quoted saying how weights should feel like you have 1-2 reps in reserve (RIR) at all times.

If my RIR feel like 3-4+ for an extended period of time... should I bump my training maxes a bit?

Someone, on a different forum, quoted Boris saying how he recommends adding 5kg to 7.5kg... or... adding 1-2 reps per set if weights feel "too easy" for a prolonged period of time.

I decided to come here and find out for myself.

Thoughts?

I think technique plays a role in that. If your technique with the current weights is very good and they feel too light, then add some weight. If you still have to do some work to maintain good technique at the current weights, err on the lighter side and wait until it becomes more stable.

Makes sense.

The weights are feeling really good. I'd say my technique is solid on about 70% of my lifts.

Any recommendations on how long to wait?

Maybe wait until technique hits 95%+ for a period of 2 weeks?