Just get two particle fusions and ruby equipped with fusion weapon . Easy 10k attack. And ceal offcourse if you dont wanna waste his attack at def monsters.
Farming for like 4000 points is pretty inefficient, and honestly is probably less consistent than stuff like Cerberus anyway. I guess the fact it's faster might matter if you just plain don't care about how many event items/keys you spend, but eh. I feel like it's worth aiming for the high-point to make the most of them.