I'm not that far yet, but the tip I've heard for this boss is to make sure the Another Force gauge is at least 50% full before you start.
Here's a thread regarding the Tower of Time:
https://www.reddit.com/r/AnotherEden..._of_time_boss/
The top 2 complaints of this game as I've seen it:
Having said all that, it's still regarded as an otherwise above average gatcha game that's a lot of fun.1. People would really like an easier way to pull/acquire a second healer.
2. The text dump of dialogue in side quests can be overbearing on people who just want some quick Chronos to collect.
I haven't played far enough yet to know if grinding and methodically using "continues" is enough to get you through tough bosses. I do every sidequest I come across so the game hasn't been too hard so far.