Invention + money making

So uhm after levelling my invention to level 14 on day release I've heard they've totally changed the way you can train the skill..? If that's the case then what is good for gaining materials (certain items) also best method of levelling the skill. I have seen a few videos on YT that when you hit 27 you can just put inventions on your weapons + armour to gain XP?

I'm pretty confused... need to get the hang of this skill.

Grind to 27 making gizmos.
Once You hit 27 what You should augment items and thn level them up to 10 and thn disassemble for 540k xp/level 10 augmented item.
You only need to make augmentor to augment an item and you dont need to add any perks/gizmos to the weapon, just augmenting is all you need for getting the xp out of it.
Bandos and Zammy gwd are pretty decent to grind unless you want to slay with low tier weapons.
Once you hit level 60 invention You can siphon augmented weapons so You dont have to destroy them (so you can use t90 weps and dont have to destroy them for xp)