Making the jump from NAAT to HAAT?

I'd say the only guage is how many "super squads" you have with good mods. And I cannot stress the mods enough. The side guns in p2 and all droids in p3 have 231 speed.

Unfortunately, they nerfed normal tank too hard to get any kind of guage. We can sneeze at it and beat it if it wasn't for our rules, but our last HAAT attempt about two weeks ago only got us down to 30% left of p3.

50 members need to be able to do at least 2% per phase with one team per phase. you may well have some members who can do more, and likely 40 that can't it seems. if the 10 can make up for the 40, you'll be good. assuming not all your rosters are up to what the guilds already clearing HAAT have, below might be a good start:

p1 jedi team, IGD lead, or better Aayla lead. anakin/snips work well, and qgj. probably do 2 and 4% respectively per leader. if you have Zylo, put him in for the last jedi spot. he'll start moving really fast, and you can use his Outrage every time.
p2 HK lead with 86 and 88, and engineer and nebit. you'll probably down the tank once. after it comes up just focus on the main tank and ignore the guns as without great speed you'll only take it down 1x and do 3-4%. if you have a clone/leia team, u can use the rebel team below (sans leia) here too to much better effect.
p3 is tough. if you can do a chirpatine team, great, or Zader, palp, TFP and 2 big tanks. STHan works well for t.m. both these teams will do 4% or more.
p4 is rebels- wiggs, chaze and leia. i'm guessing you can field them. if no chaze, use lando, and ackbar to cleanse the dots. Zody/clones/leia if you have them is even stronger. both of these teams will do 10% or more. if you don't have these teams, or they're weak-ish, use the rest of your jawas (dathcha lead), eeth koth and uggy as a warm up team to down the B2s and as much as you can on the tank. and with follow up teams, don't take the tank down... always keep the heavy gun down, and keep one of the side guns low but up so phase doesn't reset. when other side gun returns, kill the weak one. the strafing attack at reset will one-shot any toon without a green buff (which is why leia is so indispensable if you're crashing the tank).

look at it like this. each of your 50 members should be able to do 2% per phase. If not the previous comment comes in. How specialized are your teams to complete each phase; or even do more than 2 % to make up for those who cant

Until now i cant do 2% in p2 cos my teams, but i can do up to 15% damage in p3. its a matter of letting your players know where they can specialize based on what they have

@Nayr_Taurant do have the amount of damage possible for each phase? like how much health each main "boss" has.

Can you beat normal with no reset?

You don't need everyone to have four teams with 2% per phase if everyone has one team that can do 10% per phase (obviously it shouldn't be the same phase for all). Specialize in one really good team, get 10 guys for P1, 10 for P2 and so on. Since everyone has other 7* chars, it should even be enough if everyone has a team that can do 7%.

i forget the actual values for 2%... i seem to recall P1 2% was like 90k... others are roughly 2x that

very unlikely you'll do it with 10 unless they're 10 whales with beasts left right and centre.

here's everything you need:

https://swgohindepth.com/heroic-aat-prep-guide/

estimated health 100% 2%
Phase 1 (4,066,025) ( 81,321)
Phase 2 ( 19,100,000) (382,000)
Phase 3 (12,780,345) (255,607)
Phase 4 (11,995,385) ( 239,908)

@marauder thank you. is the health doubled from NAAT?