GSoJ is a very viable alternative for the mace, but mace will still be bis for feral. Moonfire is mainly used for keeping enemies from restealthing, not for damage so much. Rejuvenation is a nice heal but you should have healers around anyways and as a dps I'd rather have more damage than more survivability. Regrowth heals barely anything at all in feral anyways, so I'd prefer to cast instant roots, instead of regrowth, to get around a corner to bandage or regrowth spam yourself to full. Or switch the talent to infected wounds increasing your ToT even more or letting other teammates catch up with opponents easier.