I think there are a few possibilities here
It could have very high normal damage stats and could replace the dark flak portion of a dark/fire combo on a main part of your island. Dark flak replacement is almost required at this point since they have implemented 83,827,761 dragons that now resist this tower at higher level game play
It could have low damage but higher buff % and be able to replace a tower in a long island arrangement that has 3 current flaks at the front with red mage, and supporting blue mage right behind the halfway point of the island. Basically just use the flak supershots to cancel all spells and debuff the dragon so much and pummel with all different types of damage until it’s forced to give up the goods.
I can’t see it being used at all in normal (previous Meta) game play if a player currently only has a dark flak tower. I don’t think that the investment in BOTH the dark and electro flaks is a good idea, I think it would be better to diversify and not put so much damage requirement on the one dark flak tower (which is what this new flak will be supporting).
Either way can’t really speculate too much more until the actual stats, firing rate, range, etc come out