Your options unsubbed for pure +3 int gems:
Northrend JC - (Requires Northrend JC level 1)
Brilliant Dragon's Eye costs 1 Dalaran JC Token
Northrend JC -
Cardinal Ruby (Prospected from Titanium + Transmuted from Northrend Alchemy (1 day CD) + rare drop from
Icy Prism ) Recipe costs 4 Dalaran JC Tokens
Mark of Honor -
Brilliant Ornate Ruby
Expect to take at least 1-3 weeks on gearing if you want to go full +3 gems. The quest to learn how to transmute Cardinal Rubies (+3 gems), takes about 5 days, for 1 day transmute cds (
https://www.wowhead.com/quest=14151/cardinal-ruby) When doing the laps for Wintergrasp, I was averaging 200-300 Saronite ore per hour for a total of 1400 ore over 7-8 hours. Having stacks of
https://www.wowhead.com/item=122128/checkered-flag# and
https://www.wowhead.com/item=124671/darkmoon-firewater helped a bit. Didn't keep track of Titanium unfortunately, but I got at least 40-50 Titanium Powder, which was enough for 4-5 Dalaran Jewelcrafter's Tokens. After prospecting, I ended up with about 50-70 of uncommon gems, and 30-40 of the rare gems (Scarlet Ruby, etc.) 3-5 of the Epic Gems (Cardinal Ruby, Ametrine, Dreadstone). Saronite isn't that important anyway, since you only really want Titanium
I would say, go +2/2 Ametrine or Dreadstone gems for the 5 Transmutes (choose 1 because each of the recipes is 4 JC tokens). And then daily transmutes/honor farm for the rest