Learn spawns, know what enemies your class is capable of taking care on your own & which ones you need assistance with.
HUs can oneshot low EVP enemies such as Baranz, Belras, Zu, Mericarol and so on and so forth with Dark Flow which lets your FO & android party members deal with other threats in a given spawn
RAs can still contribute to crowd control with arrest ES weapons & Frozen Shooter & Snow Queen, and has excellent EP2 mob lawn mowing with Hell ES weapons without needing traps to do it.
Learn spawns.
Both HU & RAs can use Demon weapons to weaken (or in some cases outright combo kill tough enemies) - play more & you'll learn what enemies you can handle on your own (Gibbles, Mericus) & which ones are best handled in tandem with android freeze trap coverage (Delbiter, Merikele) if you can't freeze them yourself. Use MAG 1/10 trigger invulnerability to give yourself opportunities to deal damage without worrying about getting hit, especially in EP2.
Learn spawns.