That's the problem isn't it. Your arguments seem to produce average results yet other people out there manage to make a more impressive power with less.
This ain't a pro engine building site, so how a pro would go about a lot of the time has very little bearing on most of the builds on this site, Know your audience.
The title of this thread is 318 head porting for the average joe, and most average joe's probably aren't gonna do any porting, but this thread was designed to hopefully encourage a few to do so, most guys doing a 318 are just doing RV cam, 4bbl and maybe headers. And the few that are taking it to the 325-425+ hp range have to get there with their abilities and what parts are available to them. Generally means stock or ootb parts. And for most it's cheaper and easier to build inefficient power, the low hanging fruit.