Arjuna(NP2) vs Orion

They do different things, why not raise both? If you want to stick with one, Orion's NP hits harder, even with Arjuna at NP2, and since you have the CEs too, stick with Orion.

They definitely serve different roles. I have both myself. Arjuna is NP1 but I’ve been lucky enough to have Orion at NP3! Arjuna is a farmer. That’s pretty much his roll for the most part and has a pretty basic kit. He does that job just fine, but that’s about the most you’ll get out of him.

I personally think Orion is one of the best archers so far and would lvl her up first and max out her first 2 skills at least. She gets misrepresented as being good for male servants only. While she can do a ton of damage to them, she has no issue taking out the females. Her survivability is also much greater with a double defense boost of her first skill and a single turn evade. In an Arts team she can deal massive damage to STs and her NP reduces the targets charge by one, which shouldn’t be overlooked. I was using her in the Raikou raid with an arts boost team, and against mamma with a fully boosted NP attack she was hitting for just over 2 mil. So for bosses and long battles she is fantastic and Arjuna is good for farming the dailies and such