thanks all for the positive feedback! Kaiju's are very critical for breaking the opponents board and going straight in for an OTK. if it's bricking your hand, you can cut them down. The shaddoll's are 100% not necessary and can replaced with hand traps! this deck doesn't utilize the entire extra deck, so I use shaddolls to be able to use shaddoll fusion. 1) gets out shekhinaga which is a lvl. 10 earth machine and 2) you can dump dragon, which can destroy a spell/trap. the PERFECT deck would obviously run lightning storm.
PERONALLY shaddolls have helped me, especially with shaddoll fusions effect if an opponent has an extra deck monster on the field, and you only have say... derricrane in your hand, it's a great move. But it's all about your play style