For me, I don’t see how that big black peace sign could ever look good inside a delicate floral piece. If I were you I’d get it lasered a few times to make it fainter, and then incorporate if into the bigger piece if you still want it… or just laser it off completely and cover with more flowers.

“Enough” is such a vague variable, and lasers are so different, that it’s not too easy to say. You first have to decide what you would like to do with this, if you chose to go the laser route.
How much lighter would you want it? Would you want to make it really faint and add some colors to it, or leave it a bit gray, or remove it completely. Once you have that, you can talk to a laser technician and ask them how long it would take. It’s definitely going to be several sessions… I’d guess somewhere between a half-a-dozen and a dozen.
If you’re going to make that into a grand floral piece, I would also recommend you start thinking about it as a whole, what look you want from it, and whether perhaps you should decide on a different tattooist for the job.

Welcome to the forum!

Before you jump into laser sessions cover all your options.
At first glance I see a lot of space between the flowers and peace sign. There are many plants and flowers in dark colors that could be used to off set the darkness.
Vines with dark green leaves and dark red or purple flowers co mingling with bright flowers such as you have could work.

Do you have any favorite flowers?