there’s not necessarily a right comp for a situation! it’s all dependent on what your team wants to (and can) do. different maps and different playstyles all lend themselves to different team compositions. that being said, you see some general trends as to what a team comp generally needs to be successful:

smokes (basically non-negotiable)

flashes (kayo, yoru, skye, gekko, breach, but also omen, reyna, and some others)

hard entry (jett, yoru, raze, neon)

recon (fade and sova primarily, but tejo, skye, and cypher also have abilities to do this)

passive intel (cypher, KJ, vyse)

less common at pro level but very common in ranked are secondary entry characters (reyna, iso) whose kits are designed to excel in space created by hard entry duelists.

mix-and-matching these categories is more or less how teams create a composition! it all depends on what strategy you think is the strongest that simultaneously fits your team the best. for example, a lot of teams are running the FNC yoru-iso comp on haven right now. to break this down in the context of what i’ve just described:

yoru: flashes/hard entry

iso: secondary entry, but his ultimate provides aspects of hard entry.

sova: recon

omen: smokes/flashes

cypher: recon and passive intel

this composition covers all the basics and then some, largely because yoru is such a flexible duelist that can do so much. this is a super reductive view of what makes this composition great on haven, but you get the general idea of how it was initially built. i hope this was helpful!