Whydoes fisher have no native abilities that cost GP, and only one learned ability?

[Conradus]

(And, do the Ward abilities actually do anything on fisher?)

Since they increase yield on gathering shards/crystals/clusters and you can't fish those up (1.x had ALC recipes for turning fish into shards and crystals, so FSH could gather them that way, putting them on an even level with Miners and Botanists, but that's gone now, and still wouldn't apply in this case), it's difficult to see how they could possibly do anything.