What good archetypes have you found in triple Avacyn Restored draft? I'm looking for strategies, color combinations and core cards for each deck type. Maybe you found something that was surprisingly good or bad?
In my experience, Avacyn Restored Limited is less dependent on drafting clear archetypes than Innistrad. In particular:
The closest analogy, in my view, is core set draft.
That said, if I had to pick archetypes, I think these would win on power and consistent draftability. Think of them as a mental shorthand for "What's good in this set that I'm likely to actually see?"
White-based aggro (W/R)
This is the classic white weenie strategy, basically, with red as the strongest secondary color due to its own weenies like Lightning Mauler, Kruin Striker, and Fervent Cathar. Only some of the low-cost creatures in the set are actually good, though, while others are filler; one way this deck fails is if you draft too many do-nothing 1/2s. Auras or Equipment can help keep them relevant in the game, but many of these are weak, too. In my experience, you will be outclassed by your opponent's creatures at some point, so it's important to have a way to push that final bit of damage through, whether that's direct damage, buff spells, or even Heirs of Stromkirk.
I also think the format is just slow enough that you usually want to play a big finisher or two if you can manage to pick up a good one: that's right, shove Entreat the Angels into a weenie deck! Herald of War is actually one of the better finishers because it comes down early and grows so quick. I'd be looking to pick up some of the more aggressive midrange Angels as well, like Emancipation Angel and Restoration Angel.
Green-based midrange (G/R)
The core concept of this deck is simple: most of the other decks you encounter can't beat curving out with a good two-drop into Trusted Forcemage into Druid's Familiar. Green has a lot of playable commons and uncommons and probably the highest concentration of really good ones as well (Druid's Familiar and Wolfir Avenger, for instance!), and it easily supports splashing a third color without diluting your deck (Borderland Ranger, Abundant Growth). I like red as the support color here, because it's good to have Pillar of Flame, Thunderbolt, and all the haste cards to mess with your opponent's defensive preparations. Blue is also promising for its soulbond creatures like Tandem Lookouts but seems to lead to grindier decks; generally, I think it's better to just take the blowout when you can get it, and cards like Uncanny Speed go a long way towards getting blowouts all the time.
In addition to soulbond, there's a "power matters" theme with cards like Wandering Wolf; if you pick up multiples of Blessings of Nature (an uncommon), a bunch of cards like Champion of Lambholt and Falkenrath Exterminator suddenly become game-ending combo cards.
Blue-based tempo control (U/?)
Mist Raven is a good card. Playing it feels a lot like playing Snapcaster - Vapor Snag in Standard. Then you start using Ghostly Flicker and Nephalia Smuggler and it's like a whole wave of Vapor Snags. There are no Delvers in this set, though, so you're in for a much grindier game, pecking away for 2 or 4 a turn in the air while you frustrate your opponent with blockers and bounce; a bit like CawBlade without any hands-down awesomely broken cards, really. This deck really benefits from some card draw to generate more lasting card advantage, like the Tandem Lookouts - Windcrafter combo -- ideally using it to find your big finisher or some powerful removal.
If you pull a Deadeye Navigator, then you have a real control game in the form of a soft lock. Or, you know, a Tamiyo, but I suspect you don't need to be told that planeswalkers can totally take over in Limited.
Pro player Paulo Vitor Damo da Rosa recently wrote an interesting article on the subject where he states:
If we take Paulo's word on the subject, it all comes down to color combinations where pretty much any combination can work.
In the same article he also talks about each color's strengths and highlights the best cards for each color.