What is the most reliable bubblestrat 3.0 combination?

Totally agree. the minimum mon level in a gym should be level 5, as the trainer level that is required to battle them.

Rather get rid of spoofers than Bubblestrat imo. Not that I ever use it, but there's nothing illegal about it.

It's the only way lower-level trainers can be relevant. Until there is more diversity in the gym system, the game is better with it than without it.

I don't get the hate on bubblestrat. I understand that spoofers and people with multiple accounts can abuse it, but there are legitimate uses too.
I use it as a gym tactic. I'll take a gym and bubble* it up to 18k prestige or so in 15-20 minutes. Then I leave. Most of the time others on my team will put their guys in and once a gym is level 7+ it sticks for at least a few days.
I say "bubble" but I actually use magicarp and attack with bellsprout. Not resource free, but 1 regular potion for every 4000 prestige.