RE: Python code for identifying Splinterlands' best brawlers.

yeah that is where i think you need to use the hive blockchain.
For that i use the hive python package (beem)

Here is some example code:
This will only be valid with tournaments that have an entry fee i think.

from dateutil.parser import isoparse

from src.api import hive

from_date = '2024-10-14T01:00:00.000Z'
till_date = '2024-10-20T23:00:00.000Z'

account = 'beaker007'
from_date = isoparse(from_date).replace(tzinfo=None)
till_date = isoparse(till_date).replace(tzinfo=None)

transactions = hive.get_spl_transactions(account, from_date, till_date, filter_spl_transactions=['sm_token_transfer'])
for transaction in transactions:
    data = json.loads(transaction['trx_info']['data'])
    if 'type' in data and data['type'] == 'enter_tournament':
        print(data['tournament_id'])

The calls that i use are defined in this file:
https://github.com/gamerbeaker007/splinterlands-statistics/blob/main/src/api/hive.py

Not the nicest code (with retries and node selections etc)... but it works for my use case :)
I did not test to see if this works when used with years old information. My use case is just tournaments of last season