I'm definitely the wrong person to ask about rods for both waggler and trotting. I prefer different actions for either rather than a compromise rod in between the two.
However, there are still plenty of current three piece rods out there. Some are better than others and these are not recommendations.
Drennan Acolytes, Several Daiwas, Tricasts, Shakespeares, MAP Parabolix, Garbolino Essential, Maver Signature Pro Classics, Preston Carbonactive Superas, Shimano Aero X5. The biggest issue I see is that many shops, especially those attached to commie fisheries, don't stock such rods. Not surprisingly, they sell more commie style two piece rods of 12' and less