I'm personally highly in favor of
Serene Grace. The opinions on it seem to be rather mixed though, ranging from it being overpowered to allowing CAP18 to be another Entei, so I'd like to address some of these a bit.
someone said:
Finally, while I can see the attractive of Serene Grace Scald / Lava Plume, it just seems to me a powerful option that...is not really linked to what we're trying to accomplish; indeed, we will be probably able to cripple things once we're in, but that doesn't stop Aegislash from coming in, throwing Shadow Balls around and fleeing at the last moment, or Earthquake-spamming mons from ripping us apart if they can hit Latias somehow. That looks something that any team could use quite well (think Entei), which isn't really our goal.
I think, as an offensive ability, Serene Grace is definitely one that has high utility towards scaring Aegislash. The threat of a burn from potentially both forms of CAP18's STABs is certainly going to make any Aegislash think twice before coming in, so I really don't see how it "doesn't stop Aegislash from coming in." The main problem here, is once Aegislash himself is in, we don't want to to have CAP18 get smacked in the face with a powerful ghost move while trying to switch in ourselves. Having Aegislash "throwing Shadow Balls around and fleeing at the last moment" is much less likely to happen when against a serene grace CAP18. Let's just hypothetically say CAP18 comes in, takes a shadow ball and survives. If it has serene grace, its opponent
seriously has to think twice before switching out. If it switches to a non-fire, there's a 60% chance of it getting burned. If it switches to a fire, well, then that fire type will likely be faced with super effective damage from scald (yes, we haven't decided on moves yet, but scald is fairly safely assumed since you're hard pressed to find a competitive water type without it). This in turn makes it a fairly difficult choice that the Aegislash user has to make if he wants to switch out. In a lot of cases, this will then be far from a free switch that will allow "fleeing at the last moment" for Aegislash. It's already a given that Aegislash doesn't want to switch into CAP18 due to the typing and risk of taking a super effective hit, but with serene grace it gives the opponent some doubt when thinking about switching out. If Aegislash is less likely to switch out, then there's also a better chance for CAP18 to gain some offensive pressure against this noteworthy foe.
The problem, however as I briefly mentioned, is that serene grace wouldn't provide any super solid options to switch into a shadow ball or shadow claw. Bulletproof might stop the former, but it is useless against the later. Serene Grace's chance of burn lowers the chance of taking two full powered shadow claws to the face, but doesn't stop a shadow claw + shadow sneak combo. But what abilities do we even have available that can stop shadow claw + shadow sneak? It's a very tricky dilemma. Without an extremely haxy rendition of flame body, I don't see much that can stop it. Something like poison heal might give the CAP increased survivability, but then it just encourages an Aegislash to switch out if it can't KO CAP18 first.
MudcrabDL said:
You know, thinking about it, I'm starting to like the idea of Serene Grace a fair bit. Both are very good for allowing the application of special effects/conditions while still maintaining offensive pressure, which is essentially what we're planning on doing if I've read the zeitgeist right. Indeed, CAP18 could, with these buffs, run pure attacking sets with Assault Vest, which would help shore up the Shadow Ball issue.
Serene Grace + assault vest could at least (sort of) help CAP18 switch into either physical or special Aegislash, assuming it has enough physical bulk for the former. We have a lot of unknown variables here, though, so relying on physical bulk that we may or may not get in later stages of discussion is always a risk.
Overall, I don't feel like Bulletproof is as good on an option as Serene Grace. Bulletproof might help switching into shadow balls, but it doesn't do much for shadow claws. Furthermore, if either variant of Aegislash is facing off against a Bulletproof CAP18, then it with have better conditions to switch, as the incoming Pokemon will have a considerably less chance of being burned. Sure, there are a few things that would actually benefit from the burn, like Conkeldur, but in my experience guts Conk will have trouble with Latias anyway.
As far as concerns that serene grace with burn chance moves will be too overpowered, look at Entei. In previous stages (such as the first two), there was a lot of hate on Entei being a bad Pokemon despite his 50% burn chance with sacred fire (though I personally disagree with the sentiment of Entei being bad). Having lower BP moves and slightly higher burn chances isn't that much different; if Entei isn't OP with his burns, I don't think CAP18 with serene grace would be particularly OP either. As far as concerns of CAP18 fulfilling Entei's role and somehow ending up in a position where it no longer does it's specialized core work anymore, I have serious doubts that serene grace would shift CAP18 to this extreme either. Entei's a bulky physical sweeper; we're not quite sure what build CAP18 will be (but there's even been a few suggestions in this very thread that allude to special over physical--certainly nothing that is finalized, but it also means being an Entei clone is far from finalized either if it were to have serene grace).
We want to counter Aegislash because Aegislash spells trouble to our other core members. Serene grace helps against physical Aegislash via the burn risks, and arguably can help prevent Aegislash from switching, or cripple another opposing team member in the event it does. Serene Grace provides a mixture of offensive and defensive support under the right conditions; it allows CAP18 to attack with moves, thus keeping an offensive presence, with the chance of lowering the opponent's attack to allow hits to be cushioned a fair bit. Of course, the trick is finding a way to deal with both special and physical Aegislash, and I must admit that is a challenge, specifically when switching in to take a hit if it becomes needed by the team.
Of the other abilities,
Unaware is perhaps the most notable to me. It helps lighten the blows from swords dance Aegislash, and I suppose assault vest could help on the special side. Of course (even with serene grace) deciding on items so early isn't the point of the ability discussion either.