@mrgoldy Only way to increase your chance of finding a block is to increase your plot size. As for how often you get one - it's a lottery, my phone with 120GB got one, my primary miner with over 100TB sometimes goes days without finding one.
@all you can also create a passphrase just like the original of burst with 12 words but in another language than english... I'm pretty sure that if it's not in english there will be no much dictionary's for them to try. Use an ancient or death language if you want xDD