When a solver groups hands, every solution it computes has a best point, and solving past it makes the strategy worse. Measured Best Response and LBR curves for PLO4, PLO5, Hold'em and Short Deck, and a simple rule for when to stop.
Top 20 starting hands for PLO, PLO5, PLO6, PLO8 and Big O, 6-max, solved with a GTO solver. Full starting hand rankings, compared with ProPokerTools.