I have found a way to make bots use weapons based on tiers not what weapon to use in the preference settings. It's a bit wonky, maybe not that well built but it gets the job done in my opinion. If someone can make it work better please do so! I made it with the help of this little thing right here [ ,* ] and somehow it works, bots will pick up and recognize what they usually use based on the priority list, but will also recognize the fact that any weapon in said tier is the same for them, like the vanilla ones.
For example, on a table there will be one AK and one M16 and one Autoshotty. Bots would usually go for the AK but with this they will use either one regardless of preferences in the files, but will also make Coach for example pick the autoshotgun while the rest hold on to their weapons.

So I made it like this:
Rifle Bots ( Bill, Louis, Nick, Rochelle )

rifle_m60,grenade_launcher,*,rifle_ak47,rifle_sg552,rifle_desert,rifle,*,autoshotgun,shotgun_spas,*,sniper_military,hunting_rifle,sniper_scout,sniper_awp,*,smg_mp5,smg_silenced,shotgun_chrome,smg,pumpshotgun
chainsaw,*,pistol_magnum,pistol,*,machete,golfclub,katana,fireaxe,crowbar,cricket_bat,baseball_bat,tonfa,shovel,electric_guitar,knife,frying_pan,pitchfork,riotshield
*,molotov,pipe_bomb,vomitjar
first_aid_kit,defibrillator,upgradepack_explosive,upgradepack_incendiary
*,pain_pills,adrenaline

Shotgun Bots ( Francis, Coach)
rifle_m60,grenade_launcher,*,autoshotgun,shotgun_spas,*,rifle_ak47,rifle_sg552,rifle_desert,rifle,*,sniper_military,hunting_rifle,sniper_scout,sniper_awp,*,shotgun_chrome,smg_mp5,pumpshotgun,smg_silenced,smg
chainsaw,*,pistol_magnum,pistol,*,machete,golfclub,katana,fireaxe,crowbar,cricket_bat,baseball_bat,tonfa,shovel,electric_guitar,knife,frying_pan,pitchfork,riotshield
*,molotov,pipe_bomb,vomitjar
first_aid_kit,defibrillator,upgradepack_explosive,upgradepack_incendiary
*,pain_pills,adrenaline

Sniper Bots (Zoey, Ellis)
rifle_m60,grenade_launcher,*,sniper_military,hunting_rifle,sniper_scout,sniper_awp,*,rifle_sg552,rifle_desert,rifle_ak47,rifle,*,shotgun_spas,autoshotgun,*,smg_mp5,smg_silenced,smg,shotgun_chrome,pumpshotgun
chainsaw,*,pistol_magnum,pistol,*,machete,golfclub,katana,fireaxe,crowbar,cricket_bat,baseball_bat,tonfa,shovel,electric_guitar,knife,frying_pan,pitchfork,riotshield
*,molotov,pipe_bomb,vomitjar
first_aid_kit,defibrillator,upgradepack_incendiary,upgradepack_explosive
*,pain_pills,adrenaline

Feel free to help make this better, Cheers!