Army Expansion Leviathan

Hey Guys im new to the Tyranids but i got the Leviathan Nids very cheap and now i want to expand with my Army. I was thinking about:

10x Hormagaunts

1x Tyrannofex

1x Biovore

10x Gargoyles

1x Lictor

1x Neurolictor

1x Maleceptor

Now im thinking about taking a Norn Emissary or 6 Zoanthropes

I dont want to play very competetive i just like the models but I also wanna win some games. i Know thats not a perfect list with the Box and the list above but i like the most tyranid models so i wanna eary at least one of them but i hope that they are not to weak ingame :)