OK with EC-1118 be aware of a couple of things:
1. It is a high nutrients need yeast. I recommend rehydrating with Go-Ferm and using Fermaid-K at the end of the lag phase, and also when your gravity drops by 30%. I've found that it works well with this nutrient dosing schedule, your mileage may vary.
2. It is a high producer of H2S and SO2. This is relevant because it will produce up to 50 ppm of Sulfites during fermentation (all yeast produce sulfites to varying degrees during fermentation) Why is that number significant at 50 ppm? Because, by law commercial wine producers are compelled to label their product if it exceeds 10 ppm,
EVEN IF THERE IS NO SULFITE ADDED. Most wines produced will exceed 10 ppm of sulfite without having added any sulfites. Again, this is just the sulfite produced from fermentation. I recently learned about this in a University of California at Davis Enology and Winemaking course I'm taking. Home mead/wine makers are not compelled by law to label their product. However, that doesn't change the fact that your mead will have produced enough sulfite to exceed 10 ppm. I make it a point to label my mead indicating that it contains sulfites as part of the fermentation process. I generally don't add sulfites to my mead, but I consider it responsible mead making to at least let the people drinking your mead know that it contains sulfites, especially if you offer it to people you know that are sensitive.
3. EC will go up to 18% ABV and can be step fed up to about 20% ABV. This means that you will need to have a starting gravity high enough to leave some residual sugar for sweetness.
Here is a link to the Gotmead Mead Making Calculator. Plug in the amount of honey you plan on using, and set the total volume to your intended yield. The calculator will spit out the gravity along with the PABV and give you a good ballpark idea of where to start. This calculator is not a substitute for a good hydrometer and good hydrometer readings. Spend the coin and get a hydrometer if you don't already have one. OK, that said, to get something sweet you'll need to go with a starting gravity of at least 1.140 to get some sweetness into it. I usually shoot a little higher than that. Try the calculator and see how much honey it says you'll need.
5. Here is what Lallemand (the manufacturer of this yeast) has to say about EC-1118
Lalvin EC1118 is the original, steady, low foamer, and is popular for barrel fermentations. It ferments well at low temperatures and flocculates with compact lees. This strain is an excellent choice for secondary fermentations of sparkling wine. EC1118 can produce high amounts of SO‚ (up to 50 ppm) under low nutrient conditions and, as a result, may inhibit malolactic fermentation.
So I recommend nutrient dosing as described above, watching your temperature, and aeration of the must during the first few days of fermentation. Thereafter, you can airlock the vessel and swirl daily to keep the yeast in suspension.
BTW, for those of you who are subscribers I've posted up a PDF file containing comprehensive description of yeasts by Lallemand and Laffort in the Patrons only section. This includes temperature ranges, fermentation dynamics, nutrient needs and some flavor and taste influence notes. Also included is information on tannin addition, enolmatic enzymes, malolactic fermentation, nutrient dosing, filtering and much more.
Hope that helps,
Oskaar