I haven't tried it myself, but looking at the wiki and posts and making some educated guesses:
Table of Princes is a tribal era innovation availible to Czech or Slovien cultures which let's you pick up House Seniority succession. In effect you can get it right from the beginning of the game (Possibly Czech/Slovien starts with it, I haven't checked but even if they don't you can probably research it before your first ruler dies).
Then you build a bunch of castles in your bohemian baronies and give them to members of your dynasty.
You do this because when a new King/emperor takes the throne, their feudal vassals (possibly also Clan, I haven't tested) can decide to go pay homage to the king for a boost to both of their dynasties Renown (and possibly a gift to the king which increases the renown gained).
Since they are of your dynasty this gives double renown compared to a random dynasty.
The idea would be that you then play a series of really old rulers, whose family members show up to pay homage before the king dies shortly afterwards with the process repeating.
The cost is that you are playing a bunch of really old kings who have a tougher time dealing with all the things that takes time, such as building up your desired lifestyle traits or prestige/piety for stuff (through the prestige could get a boost from barons paying homage a bunch of time before it's their turn).
If you weren't playing tall then the constant short reign penalty might also be a concern, but personally holding all of bohemia is possible enough that this might not be relevant at all.