I think It may fill the same space as used by xantid swarm, in strom decks, the only difference being the extra 1  generc mana in its casting cost, and if you're playing jewelry in any case its not too much harder to castand while it does leave you with less mana to go off, it creates a situation where you're opponent may feel forced to counter a piece of your combo, before it would be most effective.

It also only counters the first spell the opponent plays each turn so you would be able to use the Arcane laboratory lock, HOWEVER, to cast the lab and the erayo would cause bad synergy, becuase the erayo tries to get you to play cheaper small effect spells whilst the laboratory tries to urge you to play more game breaking spells. It could work in fish though, as you only need to coutner 2 spells your opponent plays to flip this card.

Well, one of fishes worst matches at one stage was oath, and similar large critter decks, so surely the man-o-war ninja ha just as good a chance of being useful as the ninja of the deep hours, the hours can mean you could run 2+ in addition to 2/3 curiosity, and the standstill engine, whilst the man-o-war one can bounce any creature (threats) as long as you get a creature down under a trinisphere and they are attempting to race you, giving you another option to combat the workshop deck clocks.

Genju of the falls could always be used with fish as well, removing the threat of non-basic hate to an extent, by removing the conclaves, and possibly some fo the workshops.

Not sure what other decks it could go into though, could be fish 5-8 in Mono blue control though.

what is the problem with the tinder walls though? They net you one mana and can be cast off a lone spirit guide or a single land grant, providing you with access to effectivley having traded two cards and no mana in hand for 2 mana, which seems a fair enough swap. And if you want to be able to draw enough mana to be able to run the disruption you would need an average mana production of each card (after casting) to produce at least one mana, or an extra card. Both or which need to be an average of about 1.33 cards per card in hand, or mana produced.

This means the eggs are good because while they net you no card, and no mana you do however get two (correctly) coloured mana, which can be used for further castings. Whereas chromatic sphere is slightly worse because while it repalces itself it still drops you down a card.

Have living wishes been considered? They could be used to grab a lone welder from sb, to ressurect a broken belcher, because if you can get the wish through it is likley you'll also get the following card through. Alternatively the wishes could be used to grab either a workshop, or in certain circumstances tolarian academy- with lots of artifacts being able to offset the initial cost of wishing- or phyrexian negator- if you're in need of a alternate threat and can simply wish it into play, with a dark ritual.

I also feel brainstorms go very well in the deck, they enable you to filter the top three cards of your library, in a similar way to if you were playing fetch lands- with these being replaced by the land grants.

If you can reach a high enough level of mana production you could also add either unmask or duress- it would however be highly dpeendent on the build, with the more card productive ones using the unmasks as they will be able to replace the card, while those with a higher facility for producing mana being able to use the durresses to a better effect, wlthough a combination of the two would give best effect.