MtG isn't even that huge, and it just works. I used NikGapps with LOS18.1 when it first came out and there was no opengapps yet, it gave me all kinds of problems with apps and bugs and crashes. Then changed to opengapps when it was available just to see that all the same bugs were there too. Finally when i talked to someone with OP5 with lineage (has the same chipset) had all the same bugs than i, asked what gapps package he using, turns out the problem was opengapps. Then we both changed to MtG and all the crashing and errors are gone. I guess there is a reason lineage lists it as the only op