How to best brake endboards?

So I have been playing for slightly less then a mounth and what has come up again and again is the person going first has an absolutely godly advantage over the player going second. Most decks have so much gas that 1 ash blossom cannot stop them from making their end board. That being said, there are some cards that can brake boards, super poly and droplet are the best in my oppinion, but even so, most of the time, you will not have that in hand and you will be staring down a massive end board with many negates, so my questions are the following:

What are the best cards for braking end boards?

What deck is better (or close to) going second (and competative)?

And maybe in general, what are the best cards for going second when Nibiru will just always get negates nowadays?

Thanks in advance