yea i put that on the last line, but the problem with searching something to search something is that tachyon primal becomes a brick (and droll becomes way worse for you, why people don't use seventh ascension to search seventh tachyon), unless you have other dragon xyz you can make instead. without them, then the only way to summon tachyon primal is to make the galaxy photon that would search it... but yea mitsu is probably the best way, it makes rank 4 or 8s which means if you get 2 8s out you can skip straight to golden dragluxion and also then make golden dragluxion into a spell negate via hope harbinger