Tier's ETA
I'm not trying to put pressure on but any ideas of how long til the new attacking and defending tiers will be released?
I only ask as I'm not sure what to bin/keep.
Answers
To add on:
Fire:
S Tier: Moltres, Entei
Budget (but still nearly as good) fire types: Flareon, Arcanine. Flareon is better in general.
Ice: Articuno, Jynx, Lapras, Cloyster, Piloswine, Walrein. None are strictly inferior to one another. Ice is arguably the most balanced type in PoGo.
Dragon:
S Tier: Dragonite, Salamence.
Budget: Flygon. Depending on how common it is when it comes out. Or double dragon Kingdra if you already have it.
Checking top attackers (high in both DPS and TDO) from pokebattler for remaining legendaries up to gen 3:
Mew: Tyranitar, Gengar, Mewtwo
Celebi: Scizor, Entei, Pinsir, Tyranitar, Moltres, Mewtwo
Regirock: Groudon, Machamp, Hariyama, Gyarados, Mewtwo
Regice: Moltres, Machamp, Entei, Hariyama, Mewtwo
Registeel: Moltres, Entei, Machamp, Hariyama, Flareon, Mewtwo
Lati twins: Dragonite, Tyranitar, Mewtwo
Kyogre: Raikou, Zapdos, Groudon, Exeggutor, Sceptile, Mewtwo
Rayquaza: Articuno, Dragonite, Jynx, Lapras, Piloswine, Cloyster, Walrein
Jirachi: Entei, Moltres, Tyranitar, Flareon, Groudon, Mewtwo
Deoxys: Dragonite, Mewtwo
Concluding from these:
Literally god tier: Mewtwo
S tier: Tyranitar, Dragonite, Moltres, Entei, Machamp (not that many raid matchups but is still the best gym specialist)
A tier: Groudon, Raikou
A- to B+ tier: Gyarados, Zapdos, Exeggutor, Sceptile, Hariyama, Flareon, Ice-types
Weather obviously influences everything. Kyogre, Rayquaza and Latias are instant S or A tier when they are released.
Obviously it's worth it to keep top attackers for every type even besides the best raid specific attackers.