I think getting [email protected] in as well (although their activity is hard to gauge) could be a good idea, or at least it seems like that's what that community is designed to do.
The mentality I'd personally go with would be to very subtly and skirt along the rules, since I'd assume they are very keen to delete and ban any users that even remotely question their perspectives. I don't see bigoted anti-communists being very willing to debate matters that are too complex beyond their understanding to begin with, hence bans and censorship is the way to go for them.
Organizing something over Discord could potentially also be cool, i.e. among a large and trusted group, make just-barely-fitting posts and comments on the subreddit and have them pinged in order to get them upvoted quickly, which could award them more legitimacy or vision than a regular post. Would definitely be tedious but possibly effective/worth considering.
It somewhat comes across like the poster may have a history of potentially controversial posts or comments? Regardless, I personally can't say I have a very sophisticated perspective on this matter; there are much better takes out there, but in case mine could inspire or influence someone regardless:
I am personally fine with neopronouns and other extensions of neogenders, etc. This can be primarily exemplified or justified with the main desire or comfort of the person making be request, which comes at remotely no cost or inconvenience to a potential speaker.
I would argue that any other stance on this is practically inane. Those who feel themselves inconvenienced by having to use a certain name or a pronoun for a person, and then proceed to call the person making this request a "snowflake", are in fact the snowflakes themselves.
This topic has however been greatly denounced by social media through targeted remarks that thematize gender identity as a whole. The primary example of this would be posts showcasing persons getting riled up after their neopronouns or neogenders are not respected, or absurd mockery where one insensibly 'identifies' as an a 'helicopter, animal, etc'.
Those kind of posts are usually found in very irrational circumstances, such as the implication of a person raging out over the fact that they weren't referred to by [insert strange-appearing pronoun here]. A significant amount of those situations are fabricated for the purpose of hilarity (serving the same audience who will watch "Karen gets epicly owned compilations" after coming home from high school) and denouncing the validity of the LGBTQ+ community through supposed "bad actors".
At the same time, it also isn't out of the question that a person could legitimately have an exaggerated reaction over something like this, but again, their actions are often depicted as being representative of the entire community, which they are absolutely not.
I believe another imposition behind neogenders, xenogenders, etc.; is that they would serve as an eventual lead-up to the abolishment of the perception of gender, gender roles, and so on. This is a cause that I would fundamentally support, as I am personally against the concept of the "indoctrination" that people go through.
To exemplify the latter: there is no inherited condition for boys to "hate" pink, or having the urge to become bodybuilders and know how to change a car tire. It is the result of cultural evolution being misconstrued where one's fate and personality is now predetermined by a 50-50 genetical coin-toss that people feel obliged to uphold.
It's ultimately a toxic manifestation of societal expectations and I am strictly against the suppression of sentiments and feelings only for the sake of upholding conservative traditions and the ludicrous barriers established between genders that serve no practical purpose.
Neogenders, etc. serve as an adaptation to the current gender-dependent state of society, where individuals attempt to formalize and construe something that conforms to their identity; which is, in my opinion, completely fine.