If I could run 3 Night Assailants in my deck after April 1st, I'd probably use Raigeki Breaks more. Just two Night Assailants and Sinister Serpent available after the 1st. makes it more difficult, BUT, with Sangan back, it can also make grabbing one of them from your deck easier. A lot of times I tend to like playing decks that can run a fair amount of Tribute monsters, which are also great for the discard. With the right cards to discard to activate the effects of cards, you can do well with Raigeki Break, Tribute to the Doomed, Monster Reincarnation, A Feather of the Phoenix, Serial Spell, and of course Lightning Vortex. As long as you have both Night Assailants, or Sinister, they're basically all free to activate, and very powerful under the correct conditions.