Hi Zada,
When I make that loaf, I replace about 50g or so of the flour with LSA and chia seeds. So I use about 550g flour and 50g of LSA/chia. But if you like it really seedy, you could decrease the amount of flour and increase the amount of seeds a bit more.
I love that loaf, and I make it into bread rolls a lot too!
Anyway, others will probably know more than me...I'm fairly new at this!
Hope it tastes good!