Help, I made a monster (too big?)

[miletwo]

Hey folks, back to craft after a couple of moves. Yesterday I made a monster DME based brew with a SG of 1.121 and pitched Still Spirits whiskey on it. Now I'm thinking that was probably kinda dumb to keep a SG that high. It's super happy at the moment but I fear with a potential alcohol of about 18% and the alcohol tolerance for this yeast around 15% that I might have flubbed it up a bit.

Should I:
1) Leave it alone, chalk it up to experience and carry on as normal
2) Split it into two fermenters and water it down

Recipe:
3lb Amber DME dissolved in 2 gallons
5lb Sugar in 1 gallon - inverted w/tartaric acid+heat
Top it up with cool water & ice to about 5.5 gallons in 6.5 gallon bucket (still at 95° so I let it cool for a while until it hit 89)
2lb flaked corn in the fermenter
1 package Still Spirits hydrated/aerated/fed on a stir-plate for 2 hours while the mash cooled to temp.
Shoot it with o2 for 60 seconds and let it hang in the shower since yesterday.