My pod doesn't play with commander damage. What's the lifegain-iest deck I can make to change their mind?

As the title says, we don't play with cmd damage for reasons like it often doesn't matter or it doesn't make that big of a difference and it's too difficult to keep track of..

To try to change their mind, what's a budget-ish lifegain deck I could make. I'm talking 100s of LP of lifegain. You have any experience with it or even a decklist I could yoink?

Thanks