GSSR question

I've been F2P up until now, and don't have many myself. I'm going for caster even though I was lucky enough to get Merlin. IMHO, having your own supports opens up a lot of options when it comes to picking a friend support. For me, I really needed to rely on strong attack servants from friends to clear hard quests as I was still building my roster, and even though servants like Robin Hood are pretty good, using a Gilgamesh from a friend is far more useful to me than a Waver.

And even if I get Sanzang, I have used friend's Sanzangs in the past to clear some pesky assassin stages once they get out of the easy reach of Medea's NP, so I wouldn't really be all that disappointed.

Roll for berserker, archer, assassin or rider.

Gameplay wise, Casters for sure. Berserkers if you want a shot at the rare Cu Alter.