Gaster mains on their way to kill me right now
Yes, i know this is not worth to do considering how much mana you lose, how you use both of your integrities and how you end the combo by approaching the enemy with low mana. If you want a good neutral combo, go check this video:
https://youtu.be/2mO04ivt3x0, it's a pretty good combo that does high dmg and ends with dt2.
Integ ReLMB being a thing now is still wild to me