Most players mistakenly choose their buy-in amount based on stake, but in reality, selecting the optimal amount of BB’s to come in for depends heavily on the level of table aggression. In the early days of online poker, short-stacking in NL was a highly effective strategy. The combination of “openy” players and their inability to properly adjust to the all in move made 20 tabling an easy task.
In live PLO, limping and passive preflop play is more commonplace. And with the pot-sized re-raising restrictions in place, short-stacking loses its effectiveness because you can’t simply jam over limpers, or re-jam all in like you can in NL. Furthermore, those who choose to buy in short are surrendering an equity edge, because there’s significant profit to be had from “over-nutting” opponents when deep stacked. The average caliber of player is typically lower at small and medium sized games when compared to online, so it’s common to find players who overvalue middle sets and mediocre draws.
Therefore, I typically recommend that competent players buy in as deep as possible (assuming they are adequately bankrolled). Often I advise players to buy in shorter when shot-taking, but that’s not simply because of the monetary buy-in amount, but because shot-taking inherently means higher stakes where from more aggressive games are common. As the number of aggressive openers and three-bettors increases, a short stacking strategy becomes more effective.