I am trying to combine galaxy eyes photon dragon deck with blue eyes. I have a good start, but its a little slow here

Monsters
2 galaxy eyes
3 blue eyes
1 galaxy knight (I have only one)
1 Photon slasher
2 galaxy wizard
2 photon crusher
2 maiden with eyes of blue
2 white stone of legend
1 marshmallon

spells
1 dark hole
3 photon sanctuary
2 galaxy expedition
1 galaxy zero
1 dragons mirror
2 dragon shrine
2 silvers cry
2 trade in
1 cards of consonance

traps
2 mirror force
1 torrential tribute
3 call of the haunted

Oh yeah, I heard that a otk is with risebell the star adjuster and maiden with eyes of blue.

yeah it targets maiden and play 1 blue eyes, but you can't use her effect more than once per turn.

Sites say that just these 2 cards are a otk, how?

use risebell and maiden to synchro summon ancient sacred wyvern, 3000 blue eyes + 2100 (+3000) ancient sacared wyvern that otk if your opp field empty thats it.

got it. what about the gallis the star blast and genex ally birdman and koaki meiru doom