Skeletal club is fail, ive tried it with both LS and 30 sp, you wont always be in melee range and the stats from buzzers or smites produce better results than the melee increase from this.
Evocators blade is fail, int is a useless stat for a SP weapon
Gutterblade is fail since the hit on smites is better then the slightly higher topend. You do not get more SP or more overall dps from flametongue weapon by having a slower weapon, flametongue weapon dmg was normalised a long while ago
Smite reaver and Buzzer blade are the best two weapons if you do not have BoAs. The stats on Smites are lovely, and if you are horde its a nice place to pick up your last 2 hit rating to cap if you're not too interested in intellect, and if you are alliance and you like stats you can use Smites and Lavishly instead of spidersilk drape.
Buzzers is also a good choice, its the max dmg weapon i think (i did some maths a while ago) but not advisable if you are not hit capped.
The benefits on both these weapons out rank their lower melee dps and lower top end.