I definitely just focus on a few. Usually it's around 50% of my party, whether that amounts to 1 out of a party of 2, 2 out of a party of 4, 3 of 6, etc. I usually just zoom in on my main starter character and then I have a balanced backup or two. For example, in FFX, my party is almost always Auron, Tidus, and Yuna which leaves me very weak in the magic department, but in my most recent playthrough, I used my precious Teleport Orbs to zip Lulu over to the white magic area and she also became my backup and healer. Out of all my games, FFX is actually probably the one I balance the most (but Rikku, Kimahri, and Lulu always seem to end up being useless anyway). In games like Pokemon, I use my starter 99% of the time and my strongest legendaries and normal types for that scant 1% of the time. In games like Kingdom Hearts where you only control one, I usually choose one of my backups to use all my power upgrades on and I focus most on them for weapon and armor upgrades - usually focusing on Donald since he's super useful as a healing backup with magic.
Any time I start a game, I try really hard to balance my time and focus on every character rather than one, but a few hours into the game, it never ends up staying that way and I always end up with a stupidly strong main character (usually with glaringly enormous weaknesses) and a host of useless side characters who are destroyed in one good hit.
Any time I start a game, I try really hard to balance my time and focus on every character rather than one, but a few hours into the game, it never ends up staying that way and I always end up with a stupidly strong main character (usually with glaringly enormous weaknesses) and a host of useless side characters who are destroyed in one good hit.