Now obviously this is just my opinion. Ask yourselves this: what's more important, having a 331 attack raid weapon, or being level 32?? For me it's level 32. The difference between 312 attack and 331 attack is approximately 200 extra damage. Once you reach rank 4 with Eris, you can trade in 1 radiant energy for 1 radiant shard. I currently have the gear and radiant material to reach level 32 once I reach Eris rank 4. So think about what's more important to you when you hightlight that weapon bubble to hit x and spend 6 radiant energy!