There is another randomizer that is an external app you can find for FE8. it will randomize your rom and has a lot of options. Plenty of the same options but also some different ones.
If you patch your rom with this self randomizer patch then pull it up in that randomizer there is an option to randomize weapon effects. So you can get iron lances with the eclipse effect. It didn’t mess up my game at least through chapter 2. I wouldn’t recommend running any of the other randomizer features from that on the patches rom since it will already randomize. But if you want random weapon effects there is a way