Everything below written in my own humble opinion.

The teststrip is something you resolve to from an economic POV when starting out. After a few good months of work you can land the first print fairly close to the correct exposure by looking at the negative and by using a full piece of paper you get the added benefit of seeing all the details in the first go which needs correction. Depending on the negative and what level of quality your are printing for the second or third print will be pretty close to an "OK".