This betta will take alot of work.
Bc you see it has the yellow fin-blue body (Mustard gas like colors). yet it also has black.
Youre taking the route of going for blue/black lace to start off, which is good.
But keep in mind that most blues and black bettas carry red in their genes and this is very hard to breed out.
And also keep in mind that red is dominant. and that red will take over yellow, bc yellow is just a mutation of red.
This means if you perfected your blue/black lace strain, and would like to now inject the yellow genes, itll take a few crossings to get the yellow to appear. your first spawn from that cross will most likely have no yellows.
the Butterfly trait is dominant so it should be no problem.
And the DT gene is not so hard. you just have to find one with that trait, and everyone else here's given you advice on that.
-Sounds like an adventure your gettin into. but thats the fun part. It may take a few years before you reach the above betta type if youre starting from scratch.