As far as we know, Moiraine has only one wilder trick, and it's the eavesdropping ward using her stone as a focus. Only the way she does it is unique.

Wilders are creative all right (all but the Tower trained ones, like the Kinswomen). Probably any channeller can be creative, but that's all before the White Tower hammers in their heads that they mustn't ever experiment with the One Power. The Tower kills all creativity its channellers have, meaning sisters may even have some of their major talents left totally unused because they are in areas OP knowledge is lost (Egwene's talent with Earth might have gone totally undevelopped had she had regular WT education). That's the big difference between Egwene/Elayne and the others (Nynaeve tended to fear the OP, so she stiffled her creativity). Egwene and Elayne didn't have enough WT time to kill their curiosity yet have had enough basic training to experiment with relative safety (unlike most wilders), and they had opportunities to experiment on their own and see when they did their ability developped and new areas and possibilities opened. The sisters in Tar Valon don't do that - only wilders had time to figure things out of their own and are brainwashed to not ever do that again - or didn't before Egwene/Elayne/Nynaeve were suddenly discovering so much they could no longer hide their heads in the ground and started following them with experimentation. We saw some sisters with "ideas" that may or may not have been personal weaves of theirs they kept hidden. It could well have been just ideas for real, that they had long ago but never dared put to the test before Egwene/Elayne and their discoveries.

Moiraine's use of objects as focus in channelling isn't "creative", it's a limitation/bad habit she's developped before her Tower training and can't get totally rid of.

The notion that she has the mindset to experiment until she discovered how to weave balefire on her own is quite ridiculous.