So my I have a few go to teams for game modes depending on what I want to do(hero kill, base bomb, stall etc.) For raids I normally use
Lady Weldcore-DC talent, Wa insig, Zero in/chaos armor spar, Holy conviction/Hyper strength enchantment, accuracy traits,
Dynamica-Overbound bow talent, Wa insig, Lawful shield spar, holy conviction enchantment, accuracy traits,
Cold heir-DC/WA talent, Sacred light insignia, Zero in/Lawful shield spar, Holy conviction enchantment, Accuracy traits,
Axe punisher-Overbound bow talent, empower insignia, lawful shield spar, holy holy conviction enchantment, accuracy traits,
Walla Walla-Sacred light talent, stone skin insignia, lawful shield/chaos armor spar, holy conviction enchantment, hp/dodge traits,
Rune Master-Dragons cover talent, Sacred light insignia, lawful shield/chaos armor spar, holy conviction enchantment, accuracy traits.
For defense I just replace axe punisher for athene-Dc tal, empower insignia, lawful/chaos spar, hc enchantment, hp traits. I also give a empower insig to everyone but dyna(though if you dont feel like putting emp on everyone you dont have to, athene can manage).
For arena I replace axe for mummy-dc tal, emp insig, chaos armor spar, hc enchantment, accuracy traits.
For wailing rift/thbm replace Lady Weldcore for gunslinger-arch demon build-sunder,bf,pyro, attack, and walla for rambard-sacred light tal, emp insig, chaos/lawful spar, hc enchantment, hp/crit resist traits.
For team dungeons/lonely sea/lost realm I use dyna, axe, gunslinger, rambard, pumpkin duke-regen/dc tal, vamparic grail insignia, hyper strength enchantment, attack traits.
For most other game modes(gw,narcia,LBF, Labyrinth) I use much more diverse heros and builds but for 5-6 hero game modes these heros and builds are what I have been using for the past little while and they all survive great and can kill most teams I go against at 1.3 million might so if you are higher you might have trouble but if not then these teams should work.