FIrst, where did you read this.
Second, if that was said, was it stated explicitly to use as many drugs as possible? Because surely if the goal is to get the most gains possible using the most (in terms of amount and types) drugs possible will help to achieve that goal.
I highly doubt it. What's more likely is that you misinterpreted the following: Someone says "I want to do test 250mg/wk to start of slow". Reply is "why, 500mg is better with no greater risk in side effects and if youre going to be shutdown you may as well get the most out of it".
All of that dialogue is STILL in the context of a first cycle.
Please show me where people on this site have explicitly recommended multiple drugs for a first cycle.
And your question about why test only for a first cycle has been asnwered so many times it's making my head spin to see someone ask it who claims to have done research.
4 words: Source of side effects
If you dont want to get flamed then all you need to do is type into the search bar 'first cycle' and read the thousands of threads on the topic.
I know for a fact that dozens of people come to this forum, read, and then do their first, second, and third cycles without ever making a single post. This stuff is not complicated until you become very advanced. And on top of it you have a biochem degree, so you cant exactly play the moron card.