Still got a whole lot of time until then, never know what level squish and bracket stuff will do better to be safe than sorry. 378 and 388 at 119 is nothing to scoff at, hopefully can get even better from the anniversary raid. I would definitely do 119 for the gear now because Merlin is right, once the event is done you can't go back and get the gear later if you want to change your mind and you can always make another 110 or 111 later. 110, 111, and 119 all have their own various advantages and disadvantages so its not too clear cut, its best to read about it a little bit to choose which option best suits you.