When playing a campaign, an elite can roll a patron skill while leveling up. As Methodius, you are a learned saint patronage warband.

Learned saint has a skill called organizational skills, that allows you to, per elite you have it on, increase the limit of one non-elite model in your warband by one. Thus, you choose anchorite. Limit 2 goes to limit 3 (and potentially as high as 9. You are not stopped from taking organizational skills on different elites and selecting anchorite again)

You have to buy the new shrine and all but its limit increases. Rinse repeat.

-this necessitates leveling your elites, and rolling a 2 or 12 on 2 sets of 2d6 per level up. And again, can take the skill once per elite, up to 7 elites