Here is other valid and serious forum that talk about altcoins -
Altcoins TalksThat forum was totally crap. Bunch of spammers and you will never find a good discussion there. Even if altcoin section in this forum is just a sub section but the quality from this forum compared with it is actually different. I think that there's no reliable altcoin forum other than this. I remember that there was also a forum called bitcoin garden and something else but these forums are also full with spam. It's better if he was joining directly into the telegram group that managed by the project. This may become the best choice for him consider that if he will get nothing if he was only find garbage forum.