For Argentina in fact it's just as simple. You start with lots of small farmer pops, a few clergy pops, 2 officer and 2 aristocrat pops. Clergy can be demoted instantly so if you set wealth voting rights there are four conservative pops. To win you need five liberal middle strata pops. Aristocrats start with ridiculous savings so it will take a lot of time to devolve them. After that you will have 2 conservative pops (officers) so you only need three clerk pops. This is still quite a lot of money so devolving officers as well might be considered. I always valued them highly because they generate leadership points. In the present patch they cost less than clerks to promote and the resources needed are much easier to grab early on the WM. So if you starve them from the beginning nothing really bad happens and the reward is having a liberal democratic government at the price of one promotion of the big pop that is usually done anyway because of RPs. The process of starving shouldn't take much longer than two years after which you have one of the best immigration attracting setups possible. You only have to remember that you need to starve the unwanted first and then promote clerks.
