If you were here during the last couple of patches it would have taken you a while to get to i110. It's always faster to play catchup to the previous high-tier.

Syrcus tower is a good option but I would also recommend unlocking and doing the Daily Roulettes as you get a hefty amount of soldiery per day. Since you probably have missed several dungeons they also give bonus soldiery so it will pay off to get them done.