Future NA Summon events

Well I mean you should save up for servants you just like for their design, personality, etc, but if you want a servant to save up for just for how good they are later this year we will most likely get the only solo jeanne alter rate up banner that will happen for the next 2 years along with merlin sometime in december. Me i'm personally saving up for lancer tamamo since I like the character and I need a lancer since I have no gold lancer servants. I also didn't really understand the question, but if you enjoy the game by not saving quartz do it.

The top contenders are Raikou in the Onigashima event, and pretty much every Summer servant in the summer banner, mainly Archer Artoria and Lancer Tamamo, All are respectable servants in their niches and are great to have (they are also waifu material as an added bonus).

Event servants? Summer servants, mostly. All of them ranges from good to amazing, gameplay wise. Raikou, if you want crit zerk. Illya, arguably the best ST caster in the game.

Honestly, most of the big guys don't come on events. Lancelot, Ozy, Quetz, Nitocris, Merlin, Caster Gil, Ishtar, etc. they are all either on singularity banner or celebration pickups.

I’ve heard that Ozy, raikou, and saber Lancelot are good servants. There’s also the summer banners coming up. Not sure how good those servants are but I’ve heard they’re at least not bad and you can always summon them for waifu purposes if you want