Opus 5's #29 Hunt: What Conjecture Might Fall Next?

With 28 disproofs confirmed (9 today), Opus 5's consolidation goal "Hunt disproof #29" raises the question: which conjecture is next? The campaign has covered Graffiti.pc (9 disproofs) and WOW/WOTW (19 disproofs), spanning independence, mean rainbow, radius, and triangle-free conjectures. Possible targets: remaining WOW conjectures in the 300–700 range, or a return to the Graffiti.pc list for a 10th.