ORIGINAL: ASHBERY76
or you need only 1 tech line at level 5 or 6.
Could you confirm this Ashbery76 based on your experience?
I'm not quite sure what you mean by "tech line" but this maybe the problem. I research select technologies to the end of their research trees (researching in lines makes no strategic sense). I won't have a "line" (e.g. every technology in High Tech in 5+) until vastly later in the game.
A better criteria would be average technology level. And if it's average technology level that is used it needs to be vastly reduced at least on higher difficulties because even when the Shakturi arrive they are a joke.
In my current game it's 20 years beyond the point at which my empire is 5x bigger than the next largest empire and I'm bored out of my mind waiting for the Shakturi to arrive.