First of all excuse me for my english
Ive been playing gay/red and fish for almost a year but im having problems with the deck, especially facing random aggro
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Sideboard:
2 Blue Elemental Blast
2 Fire/Ice
2 Maze of Ith
2 Rack and Ruin
2 Sigil of Sleep
1 Red Elemental Blast
1 Firestorm
1 Stifle
1 Sword of Fire and Ice
1 Misdirection
GayR or URFish typically does have problems with
good aggro decks (which are rare, but things like TnT fit the bill). Looking at your sideboard, you run a lot of 1's and 2's of sideboard cards, which a lot of Fish players seem to do. While this might seem cute and allow you to fit in more things, I would suggest you narrow your card choices and choose the best ones. Think about Maze of Ith, for example. What is it in the deck against? You show that you are siding it in against Landstill, GAT, and probably other random aggro. I would drop those 2, and roll with 4 Sigil of Sleep, as they are just as good in all of those matchups, and probably better actually against Landstill and random aggro, which both tend to run 5 strip effects, thus negating any advantage you might have gained by dropping a Maze of Ith. I would also drop the 1 Sword of Fire and Ice and 1 Firestorm for 2 Gilded Drakes. Gilded Drake + Sigil of Sleep on any of your creatures pretty much equals game over for an aggro player. Also, to fully take advantage of Sigil, you might want to main deck 2-3 Razorfin Hunter. They are really awesome right now with all of the Goblin Welders in the format, and are also great against things like FCG and Xantid Swarm. Their synergy with both Curiosity and Sigil of Sleep makes them even better, and that's the reason I run 2-3 in my build. Here is what I would recommend for a revised creature base and sideboard for your deck for the expected meta you described:
Creatures (16)
4 Grim Lavamancer
3 Razorfin Hunter
4 Cloud of Faeries
3 Spiketail Hatchling
2 Gorilla Shaman
Sideboard (15)
4 Sigil of Sleep
2 Gilded Drake
3 Blue Elemental Blast
2 Red Elemental Blast
3 Rack and Ruin
1 Stifle
Try it out; I'm pretty sure it's what you are looking for.