I can never balance the the g'hern/ moga/ spell-equip-relics well enough, I feel, to be effective with them.
The new moga is OP. So is mika imo (if you get a bit lucky with the feshes). Moga lords guard definitely is.
G'hernless Moga is decent now too. Still run into some trouble against swarm units (then again, most cheap unit spam decks have that problem).