Also only 3 out of the 6 weaknesses are due from dragon typing and the bug dark and ghost weakness is from psychic. Dragon is weak to ice dragon and fairies yes psychic hinders its typing and could have been replaced with a better fighting resist like fairy or even ghost to have a better defensive typingWhy latios is A+ rank imo:
I would like to state the I thing latios is one of the best mons when it comes to offensive pokemon only coming second to keldeo this is my opinion I mean like orb draco does so much , I shouldn't really have to talk about latios offensive potential to much because it really good I can talk about it more if need but no I'm going to talk about things I that people have missed one every one is going to it can be pursuit trapped..... But it can really only be pursuit trapped be one mon in the tier being T-tar bisharp dies to two draco's so I really struggle to find the argument to that weavile dies to one draco scizor dies to HP fire and Mega metagross dies to two HP fires and pursuit doesnt kill if latios doesnt switch so its a 50/50 and even t-tat can struggle trapping latios since after rocks latios EQ two shots Band t-tar with 4 attack investment it an guaranteed two hit on banded t-tar 4 Atk Life Orb Latios Earthquake vs. 100 HP / 0 Def Tyranitar: 161-190 (43.9 - 51.9%) -- guaranteed 2HKO after Stealth Rock latios literally can play around every pursuit trapper given the right set I admit you can run HP fire and EQ on latios so you will always run into trouble with
Latios defensive typing :
Ok latios typing isnt amazing it good not amazing in fact psychic is one of the worst defensive typing in the games being weak to dark typing and Bug typing isn't good mainly because it means things can come in and u-turn on it and pursuit trap it although I talked about how latios can deal with pursuit trapers it doest mean it likes to play against them and with u-turn it means it constantly giving momentum , but there are good things about his typing one of them being it wall the best offensive mon in the tier AKA keldeo and being resistant to volt-switch is very good to also thanks to good defensive typing it can defog on quite alot for example being to defog against one of the best offensive mons in the tier keldeo is an amazing quality over it typing is very good but weakness to Ice/Dragon/Fairy/Dark/Bug/Ghost like TURBODERP said is very much a hindrance to latios
ThatGuyWhoMashesMeteors you ask why 110 is a good speed tier well it becuase many pokemon fall just sort of it like keldeo and terrakion which make latios very good at revenge killing alot of the ou tier it also means that it out speeds thing like garchomp and speed tier with mega gross gengar and out speed base 100 and base 108 two very common speed tiers
sorry is this comment is a bit late I though id state something that I though were over looked / not answered when talking about latios