Hey, is it just me, or does zombie frenzy seem to be a bit OP?

When you are playing against Druid your zombies are hindered by the Druid's vine markers, making Zombie Frenzy nearly useless as far as mobility is concerned. Zombie frenzy only seems OP if the opponent lets you get out too many zombies, but at that point the opponent is probably losing anyways. Zombie Frenzy has a steep cost for Necromancer, especially when you add in the fact that he can easily become mana starved if he is running two spawnpoints and/or the opponent puts down Obelisk or Suppression Orb.

So to answer your question I don't think zombie frenzy is OP. A card isn't OP just because it is very strong in certain scenarios. Kralathor is extremely powerful against Necromancer but that doesn't make him OP because he isn't as effective against the other mages.

Recently received my copy of FiF. I'm focusing on a build centered around having a large/strong army and taking advantage of Harshforge Monolith. I am trying something that is perhaps a little unorthodox: a warlord build with no enchantments and  no attack spells. Why no enchantments? So I don't get hurt by my own Harshforge Monolith. Why no attack spells? Because I don't really feel like I need them since I have access to plenty of soldiers with ranged attacks. I am, of course, using the Anvil Throne Warlord because his runesmithing ability is fantastic.

Conjurations: (11)
1 Barracks (3)
2 Garrison Post (2)
2 Wall of Pikes (2)
2 Wall of Earth (2)
1 Harshforge Monolith (2)

Equipment: (13)
1 Helm of Command (2)
1 Harshforge Plate (2)
1 Leather Gloves (1)
1 Ring of Command (1)
1 General Signet's Ring (1)
1 Morning Star (1)
1 Veteran's Belt (1)
1 Colossus Belt (1)
1 Regrowth Belt (2)
1 Leather Boots (1)

Creatures: (64... could be overkill but hey I like having variety)
4 Goblin Grunt (4)
4 Goblin Slinger ( 8 )
2 Goblin Alchemist (4)
4 Orc Butcher ( 8 )
1 Gurmash, Orc Sergeant (3)
1 Thorg, Chief Bodyguard (4)
2 Dwarf Kriegsbiel (6)
2 Dwarf Panzergarde (6)
2 Anvil Throne Crossbowman (6)
1 Ludwig Boltstorm (3)
1 Grimson Deadeye, Sniper (4)
1 Bloodcraig Minotaur (4)
1 Sir Corazin, Blademaster (4)

Enchantments: (0)

Incantations: (32)
4 Power Strike (4)
4 Defend (4)
2 Perfect Strike (2)
2 Piercing Strike (2)
2 Evade (2)
2 Flank Attack (2)
2 Charge (2)
2 Battle Fury (2)
2 Dispel (6)
1 Dissolve (2)
1 Heal (4)

Attacks: (0)

Turn 1: Barracks + Garrison Post
Turn 2: Garrison Post + General Signet's Ring
Turn 3: Harshforge Plate + Ring of Command
Turn 4: Gurmash + Goblin Grunt / Goblin Slinger / Goblin Alchemist / Orc Butcher

I'm thinking of changing my Necromancer build to be skeletons + Venomous Zombies.

I have tried skeletons+zombies necromancer where the only zombies I had were Venomous Zombies and Zombie Brutes. I have also tried a mix of mostly zombies supported by Grey Wraiths and Skeleton Archers. Both builds worked just as well as 100% zombies. With Necromancer you can easily just pick your favorite undead creatures (whether skeleton or zombie) and build a spellbook around them.

I use both the altar of skulls and libro in my swarm book. I also use a combination of skeletons and zombies.

A mix of skeletons and zombies can be very effective. Both Deathfang's speed and Skeleton Archer's range can make up for your slow zombies, and it is helpful to have skeletons to guard your mage while your zombies go on the offensive.

Mostly curse-heavy Warlocks and Wizards, of what type and playstyle is yet to be determined.

Wizards a are a tough match for Necromancer. yuck.

I really like this spellbook, and I am definitely going to use it to make my necro spellbook better. 
 
Rise Again seems to be a good choice on account of the fact that the creatures rises in the zone it was killed in.  Combine this with the fact that all of those kinds of zombies are Slow, and maybe you should take out an animate or 2 for Rise Again.

For me Animate Dead > Rise Again because Necromancer can be very mana-starved, especially if you are using two spawnpoints. Another reason is that I think killing the enemy creatures faster is more important than killing them with the intention of reanimating them. Necromancer can be fragile so I tend to think of reanimation as more of a perk than a necessity. If anything the Necromancer is the last mage who needs reanimation since he practically has an infinite creature supply already.

If you want to fit in more curses and perhaps a block or two to keep your zombies alive then I would trim down to only 2 Unstable Zombie and 2 Plague Zombie. I just like having a lot of Plague Zombies because, like Venomous Zombies, they are very effective against mages that only use living creatures.

Just out of curiosity, would any of you consider zombies better than skeletons overall, or vice versa?  Or are they about the same?

I prefer zombies a lot more over skeletons. Resilient is very helpful and the lumbering trait isn't that annoying once you learn how to play wall of bones, chains of agony, force push, and zombie frenzy to put your zombies in a good position and trap the opposing mage. In addition, Venomous Zombies and Plague Zombies can be devastating against living creatures and really make the most of the Necromancer's plague master ability. If they add more skeletons that inflict poison conditions then I may consider skeletons. Finally, I hate how fragile skeletons are. You have to invest in reassemble, acolyte of the bog queen, mort, and perhaps fortified position just to keep the darn skeletons alive. But I do find the skeleton archers handy and Mort to be pretty badass.

I play Necro a lot and I hardly use skeletons. Just not my thing. If you plan on running 100% zombies it might help to check out my zombie swarm spellbook. I don't want to call it "finalized" because, lets face it, are spellbooks EVER finalized?