Eye, read the post above you, read the lesson plan I wrote and then feel free to delete your entire post again. Going into specifics about certain upgrades/class roles is not the best way to teach people who are new to the gamemode.
Airblast still resets the bomb if carried by smaller bots, Beggar's was explained you need to tap and buy reload/firing speed, if you're a newbie scout it is more important to focus on resistances and getting the money than dealing damage, damage falloff on splash with rocket specialist is less important than actually buying the damn upgrade to negate the falloff on the actual rocket you shoot (+stun).
Mentioning heavy is shit against tank is also very counterproductive, you better have a heavy shooting the tank than soloing front, dying and making you lose money because you're playing with random people and an inexperienced scout.