I've seen a lot of epic shounen-esque fights like those in seinen and shoujo. The difference between shounen, I think, is the main focus on the fights themselves and leveling up for those, in chunky units of plot (arcs). FMA is more one big block of plot with occasional fights (I've never seen parts of FMA being called arcs). Jump series are fights with scattered pieces of plot in between and follow the arc divisions.

I read the first chapter of the Mononoke manga and I always forget to get up to date. Is it good?