You should use what they say as a resource to gather information.
Then create your own opinion based on what you think is right.
Alternately, you can ask other people what they think of the situation.
It could be beneficial to discuss the differences & similarities to what Ayumilove says vs. Hellhades.
They both are good players.
They both see the game differently.
They both have reasons on why they do certain things.
Ayumilove often offers different scenarios of gear and masteries depending on desired use of the champ. What they show seems to work for most any level of player, whereas HH is only going to show you hundreds of champs L60 and L16 every which way, so for me he is mostly useless and unrealistic, although his info is probably good just not something I can work with usually. He has infinite resources (silver, gems, energy, champs, artifacts, etc) so at a whim he can just flip his champs and artifacts and masteries around without blinking.
So my suggestion is go with the best info you are able to use at the time.
I would say the biggest thing to decide is how long you are going to play the game, and how much time are you going to invest in it. These are big deciding factors for me in what I am going to do in the game. If I decide I am going for endgame then I push for that. If I am going to just play and have fun then I do things to that end. Then decide which of the content creators has the best advice for that outcome. Hope this helps.