Getting Hamon into the field is easy, but you can get unlucky, also he has no protection at all, so having Cerulean Skyfire on the field can help a little.
Thunder Nyan-Nyan and Thunder King Rai-Oh are good LV 4 beatsticks; Denko Sekka has a great effect that will not affect you since there are only continuous spells here.
Solidarity + Luminous Spark gives a nice 1300 ATK boost.
Some Summer Summoner is more of a filler; Play Lightning Rod Lord/Royal Decree if you are against a spell/trap heavy deck.