Blank Mage

My Berb strat was to hit him with Katima's Northern Sword (force damage) and swap to Nozomu's Cross Divider (material damage). Keep alternating, and keep a blue skill in the support role to cancel gravitron. You won't get any heals this way, but you should be able to end the fight before Katima goes down. Later, Nozomu should be able to take him alone by alternating Overdrive and Dual Edge 2 for an easy win.

I'd recommend Kindred Spirits on the Roof, great quality for the money in my opinion. I'll second Decay's recommendation for Littlewitch Romanesque, and add that the H-scenes that were cut really weren't worth anyone's time anyway. I gave Grisaia a shot, but found the main character to be insufferably nonchalant, for lack of a better description. He seemed like one of those bad fan-fic characters who's perfect at everything. The art was fantastic, but that was all I really liked about it so far. Regarding Neptunia, eh... if you've played one, you've kind of played them all. Very grind-heavy, not much depth there, and it quickly becomes obvious that they recycled most of their assets to the point where it can't be ignored. Even the level layouts are duplicated after a few hours. It's a decent game, but not for everyone. It is adorable, so there is that. Everyone should at least give Recettear a try, it's surprisingly fun and has a lot of depth in the Disgaea sense; a simple exterior with complex systems for those willing to learn them.

Nozoumu's Cross Divider is your best friend for this fight. Hopefully, you've learned it. Keep his lightning support skills canceled by having a character with Energy Leak in the support role at all times. Keep Nozoumi in the defender slot with her highest material block - she'll take a beating, but Drav should break first. Of course, make sure you're keeping your characters as leveled as your mana supply allows, and fully exploring and capturing bases to grant your characters more skills and mana.

But while I'm here, I might as well vent just a bit: I think the most disappointing thing about this game is that it's really a step back in maturity. Aselia dealt with the inherent gray morality that comes with war, the helplessness of the soldiers who fight them, and featured a cast of 'expendable' characters who you valued all the more for being just part of your little war-orphaned family. Seinarukana goes back to Tried and True High School, and features the usual cast of childhood friends and magical royalty. The villains are over-the-top omnicidal maniacs, and once again we have that forced style of 'I don't have to tell you anything about my motives, Main Character', which is something people just don't do in real life. "Why are you killing billions of people! What possible reason could there be for that?!" "I have one, but I don't feel like telling you until you're strong enough to stop me." That is infuriating, because it's the cheapest trick in the book for creating pointless misunderstandings. It's not even a trick! It's a cop-out! It would take 2 minutes to resolve this conflict with a simple explanation, but noooo, you're going to gleefully attempt genocide and laugh about it, and try to play the 'greater good' card later and expect it to hold weight, as though you weren't a sociopath in chapters 2-8. That being said, I'm quite enjoying Seinarukana.

Alright, since I'm pioneering ahead on this game, I might as well do what I can to help out around here. For now, this page features enough guides to get you through the early game without too much trouble. Hopefully, I can come up with some strats of my own for the chapters not covered later. (I do enjoy how much better this game looks compared to Aselia, but dropping the language barrier and social status issues of the first game has really made this too generic plot-wise. Really? Everyone speaks Japanese and eats mochi in alternate universes? You had to bring the school with you?!) But I digress. If it's just generic enemies you're dealing with, keep in mind that yes, your banish skills can be banished. Make sure the enemy isn't tripping your banish prematurely with some other spell, or canceling it with Ice Arrow Alpha. Delay effect spells are very hard to get the hang of, because the rules for banishing them are weird. Select the option to have your party play 'defensively' if you run into opponents with Flame Shower; it can and will one shot your party. Playing defensively means you can put your Blue into the support role in time without having to keep her there just in case. Anyway, keep experimenting with different setups until you find the one that works. In chapter one, you should have pretty much all the skills handed to you, so you don't need to worry about needing a skill you haven't learned until the end of chapter 2.