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Now that 7th ed has been out for a while, and I've played a few games under the new rules I figgured I would share what I have noticed, and ask other players what changes they noticed on the actual table.
First thing I will state, is that I have had my general (in this case a master necro) killed by miss-casting. 3 turns in a row I miss cast and then rolled an 8, and took a total of 3 wounds (the third miss cast being my attempt to heal him). As horribly unlucky as that was, I still seemed to avoid the instant death. Overall I haven't noticed the new miss cast table having much effect as long as you arn't REALLY unlucky.
I usualy use Strigoi vampires and with 7th ed I have started using iron sinues, curse of the revanant, and summon ghouls as my general. The improvements to regen have finnaly made it worth while in my oppinion, and I was able to take on a greater deamon of slaneesh (although it took some appropriate timeing for tossing the unit champion into a chalange to buy me a round to heal him).
Summoning a small unit or 2 of zombies behind the front lines of my opponent has made sure that any autobreaks due to fear arn't relying on my ability to chase. Not sure if it won me a game or not, but it has panned out once so far.
The always stand on snake eyes hasn't cropped up with me yet, but I'm sure it's just a matter of time.
I haven't attempted this yet, but I am sorely tempted to take a von carson battle standard bearer with walking death, and put him in a large unit of grave guard (20-26) with the war banner for a static combat resolution of 8 assuming outnumber.
I have had a necro die on the first spell of the game in round one due to snake eyes on the miscast table. But besides that not too bad. So you are right with the unlucky part. Besides that I have been able to take big advantage of the overrun rule. Charged a unit of skeletons and a vampire in chosen knights. Then charged the black coach into furies. Since the furies are skirmishers I did my pivot with the coach at the very last second before hitting the furies. I poped the furies and overran into the flank of the chosen knights. This swung the combat in my favor breaking the knights.
Also I have been heavily creating units of skellies behind enemy units to autodestroy them when they break. Or to prevent my opponent from fleeing.
Finally I lost combat with 2 high elf chariots (yes, I play them too) and both broke. The general and BSB were close by but I elected not to reroll or use the general's leadership as I wanted them to break. They were dead meat anyway (rolled 2 impact hits total with 2 chariots neither did a wound (when hitting the flank of chosen warriors). The reason I wanted to flee was because there was a unit of dragon ogres approaching and the fleeing chariots would have been auto destroyed but not before doing impact hits on the dragon ogres (both rolled a 7 on 3d6 and were 1/4" short and cut down by the warriors. So it failed but the idea was good.
I am less prone to taking a Banshee now, but I still make it work some times. Since my characters were pretty much always in units the new targetting rules hasn't changed much about my army.
I've also used the 'flee through enemy' and multiple combats rules a few times, but my army list isn't changed in any way to use these rules, so it's more up to opportunities.
The same with fleeing chariots making impact hits on their friends.
All in all my list has stayed pretty constant, but my style and possibly deployment has changed a little. That could be because I'm getting better at commanding my army though...:shifty:
Even though I don't play Vampire Counts, I play against them regularly and know them as well as the player.
As a skaven player I would add that 7th edition really helped us versus VCs. Specifically, being immune to psychology while engaged in close combat. For skaven, this is a big change.
Example: In 6th ed. a large unit of clanrats with an assassin engages a unit of skeletons. Next turn, VC player uses the agile dire wolves and gets a flank charge causing a panic test. As skaven have horrible leadership, and since when being flanked or rear charged they cannot use their strength in numbers bonus, this normally formidable unit has to test on 5. This is an almost garanteed lost unit.
Now, that unit takes the measly charge of 5 wolves without needing to take any tests, not even fear. I think this is a big change and skaven benefit greatly from it.
I think most of the changes balance out pretty good. Some armies might have gotten the short end of the deal a little but nothing completely out of wack. Like you said it benefits the skaven in regards to VC but you suffer from normal armies with shooting as your ratling guns are now easy pickings. VC suffer from that there are now much more units immune to fear due to a character in it but benefit from the fact that we can raise units behind enemy units we are about to break and thus auto destroying them. They did a nice job with the new rules. It make the games much more a game of tactics.