As someone who follows the NASL, the Cosmos are very good and definitely the best team in that league. Raul is still the best player on the team and has scored 4 goals in 10 games so far for the Cosmos often being subbed out early at the end of games to help keep him fresh. Even at 37 years old he is good enough to cause us problems and will cause us problems throughout the game, he also has solid help in the midfield from Andres Flores (Who has captained the El Salvador national team), Danny Szetela, and Walter Restrepo. They also made a good signing to get Lucky Mkosana who has scored 3 goals and 9 games for them and has been a nice improvement in front of goal from last season for them. The defense has looked sketchy at times for them, so I would say that is their definite weakness but I seriously advice against underrating this Cosmos team and expecting an easy win because we are in MLS and they are in the NASL.
Also the NASL takes this competition a lot more seriously than most MLS sides do. The spring season also just ended so the Cosmos don't have to worry about a game this weekend like we do, so they will field their best possible XI which we in all likelihood won't be doing.