You should try eula hyperbloom for 2nd half, i just tried it and it went better than i expected. I used kuki instead of raiden for the heals, elegy yelan and nahida, but you can do it however you like.
Even with a kinda meh setup on my Navia, R5 Lv 80 Melusine claymore and 2pc ATK 2pc GT (ATK/Geo/Crit) and a Nahida/Xingqiu/Kuki pairing, I was able to clear first half pretty easily. Tulpa was the only thing stopping me first time because my Cyno Quickbloom team couldn't trigger Quicken nor Aggravate 😅 Not that optimal thoughbbecause Navia's solo shard generation was poor, but worked surprisingly well. May try pairing her with Zhongli since Tulpa destroys Albedo flower too often, though he still might be doable. Then maybe just try taser or vape
he is not “good” with navia. the synergy of them being two geo units isn’t stronger than if the team in this video had a xiangling. the only reason to pull for zhongli over kokomi is if your not able to dodge enemies effectively. otherwise kokomi will give you access to a lot more teams, bloom adjacent teams especially.
Xingqiu's for the to dodge the attack and provides some damage resistance (I have quit Genshin for a while but maybe its the skill, sorry?) and Yelan's for the passive that it boosts the damage of the on-field character so it makes Hu Tao's dmg bigger ^^
Both are different character One is a offield dps And hutao is a onfield dps which very high single target dmg Hutao can drive offield characters Xiangling cannot Hutao is also self sufficient whereas xiangling is not Ultimately it's just a preference I would not promote or suggest hutao unless you can invest more in her
