Solar Teams are good for short fights, where you want to do as much damage as possible before the enemy even strikes back, ideally, even killing the enemy before that happens. Trigger Teams are much the same, they deal a lot of damage, but their sustainability is often lacking. For extended fights, Dodge Teams and Debuff Teams are generally better, able to compensate their generally lower damage per combat round by being able to stay alive for enough rounds to more than compensate the difference.
Both types of fights commonly appear in events. So for those who want to maximize their damage and have the girls to make proper teams for the occasion, it's definitely worth it.

I'm running both a Debuff Squad and a Trigger Squad in my main unit. Each has its own merrits. The Debuff Squad tends to take very little damage, and can survive almost any encounter. The Trigger Squad on the other hand, rarely takes damage because it simply nukes most opponents during the first round of combat already. But, when opponents manage to survive that first round, this squad also takes soo much damage, that one or two of them may get knocked out.
My Solar Team is more of an odd-ball team though, it's designed more around gathering lots of Solar Crystals and often having Solar Beam available, than about buffing Solar Beam itself (only 40% bonus).

quite frankly, my 5 girls in my sig are all waiting on blooms (aside from sakura) so they all add to my setup...

they already get a rather large atk increase (about 70%-100%), but all bosses take a 1.05 damage multiplier and raid bosses face all this and an extra 35% atk boost to my team...

but when some blooms come in, i'll start getting SB increases, atk increases from SB, more skill rate (i think it hits double at that point), and 3 girls (iberis always being one of them) will be dual element each fight (doing extra damage to both magic and striking weakness).

that's honestly quite a massive set of abilities when you think about it. which already includes someone dodging (lycoris) and someone doing counters (helenium)