For those starting out - do NOT waste Gil on energy. Limit pulls to cheaper ones (daily half price) until a good banner. Finish the Colosseum for better equipment, and do your dailies. For the crafting trophies I took a different approach, and am almost done. When you get to the point you you can farm TMR, I asked for Water Crystals to make potions, and went through that trophy really quick, because you get the rest of the ingredients in spades while farming. Same goes for using light crystals to farm Cure over and over again for another trophy. And leather whips galore using TM farming ingredients as well. Easy to do when farming TMR. Most of the trophies will come to you naturally as you play.
Just enjoy the game - there are many with units that can carry a starting team. Agree about farming Frosty the next couple of days for some pretty nice starting equipment. You have two more days to do so.