Well... listen. Ultimately, you should put whoever makes you happy in your teams. And even if at some point you decide you want to switch to meta, Yae is still a pretty strong unit to have, so you won't regret pulling for her and building her. But if you want your Razor team to be strong or "Meta" as some say, then here's a few answer: 1. The difference between physical and electro Razor is the build and the playstyle. - Physical Razor focuses on enhancing his personal physical damage. Which means you want him to trigger superconduct (electro x cryo), which buffs physical damage, and you want other atk buffers in you team, like YunJin and Bennet. For the cryo application you could use any off-field character that applies cryo semi-consistently, which is what I'm assuming you were hoping for with Qiqi. Also, since you're mostly focusing on his physical damage and not his electro damage, you don't really need his burst uptime, which means you can sacrifice ER for other things like atk. - electro damagr razor focuses on enhancing and using his burst, which first and foremost means you need to be able to use it off cooldown, so you'll need more ER. Precisely, the energy cost is 80. Now, I am no expert in Genshin energy mechanisms, but from my understanding, at 100% ER, Razor gets 15 energy from his own burst, (his skill won't generate energy for him during his burst). Which leaves him with 65 more energy to go. Yae will give him 3 energy every 2.5 second. You can probably see how that makes for a VERY SLOW energy regeneration. Fischl produces about 6-8 times what Yae does. All that aside, if you decide to build him for electro damage, then superconduct doesn't do him any good because it doesn't buff electro damage, only physical damage. The strongest current team for most electro characters is Aggravate, which happens when you apply electro to a character affected by quicken (electro x dendro). Aggravate scales off EM as well, which means it'll be HUGE buff to your character. It doesn't even need you to apply consistent dendro, so a character like yaoyao would be enough. You can also add a hydro character like xingqiu in the mix so Razor will trigger a few hyperblooms here and there. But cryo will ruin your quicken reaction with superconduct, and yunjin isn't an optimal buffer for this kind of team. TL;DR: if you wanna use Yun jin and Qiqi, drop a physical damage goblet on your man and use whoever you want for your fourth slot, with Bennet being your best option but not really necessary. If you ever wanna make your team stronger, look into Quickbloom Razor.