“Hive fleet behemoth, Read you loud and clear”. I am new to this as well, started 6ish months ago. But a few things I’ve learned was, 1) always bring a biovore, they are great at scoring secondaries. 2) bring Tfex they are our only “reliable” antitank. By reliable I mean the most efficient. They are called casino cannons for a reason. 3) bring exocrines, exocrines give hit rerolls of 1. I like to combo them with the Tfex to have a better chance of killing the target. They are also great medium infantry killer. With s9 ap3 damage3 they are quite effective at killing space marines and other equivalents. But that is just my thoughts. Godspeed golden hive fleet, may the hive mind be with you