from what you wrote you are using the standart lightning armor build with: iruka - asumaWB - danzo/darui/guy. yes this team is good because it abuses the fact that most teams dont really care about round 1 and only really start working on round 2

but dont think its the end all be all team, a lot of things stop this team and make it practically useless like hinata/kimimaro in from of lightmain, clones that survive more than 1 hit, round 1 aoe dmg that brings lightningmain below 100% hp or the good old blind from windmain passiv or mystery

so yes its a strong team that beats a lot of other teams but if it is stopped round 1 you automatically lose too