Creating characters in Mythras is reasonably complicated, especially since one must go through three separate steps to spend skill points, each of which has different restrictions. I won't be using the rules below rules for character generation for the pre-generated characters I'm putting together for the scenario I'll be running at LozCon, but I may use them for Runequest / Mythras character generation in the next campaign I run.
Instead of selecting a culture, career, and spending bonus points, you select seven standard skills, seven professional skills and up to two combat styles (not counting Unarmed). You must spend at least five skill points improving each of the fourteen to sixteen skills, and may spend up to 45 points improving them. This produces characters who are almost identical to regular Mythras characters but without all the substeps. Theoretically, characters could end up knowing two kinds of advanced magic (sorcery and theism, say, or even just two schools of sorcery), which I'm personally fine with. If you're not, simply impose a limit on how many kinds of magic a single person may know.
The restrictions of the substeps theoretically force you to spend points to ensure your character has a basic competency at things their culture values, but in practice, I don't think dumping five skill points into standard skills you've already got a basic ranking in accomplishes that. What it does do is force you waste about 20% or so of the points you got from your cultural background on skills you don't want more than a basic ranking in anyhow. At least by choosing the standard skills, you'll be able to make sure they're all ones that match your character concept.
Personally, I think I'd all up to +50 to be added, to encourage a slightly higher degree of specialisation, but keep the overall size of the pool (350 points) identical.
Some people no doubt find the culture and career process helpful for shaping their character concepts, and I recommend people who do so use the method in the rules as written, but I often find them at least as much a hindrance to realising a character concept as a help personally.