My question is, with the friend limit, why would I want to fill it up with people I have no association with other than using this app?
Well, the good news about Toro is that I know all the people I've met through it have a Vita.
I'm looking forward to having some familiar faces when Killzone finally ships (if you play Toro a lot, you do get to know people's identities a bit, even if the icon is often a FB graphic and the Toro name can differ.) Wake-Up Club is similar. I've not made "friends" over any of these games, but there will be people I will recognize when/if Vita online gameplay picks up with something big (RIP SOCOM PSP, the online game I actually met good people on.)
In general though, I feel like if you're asking what this game is for, it's not for you. Toro's Friend Network is kind of dumb and half-built and handcuffed and DLC-oriented and limited. It's a time-suck, a Facebook app made for your game machine. If you can avoid the addiction, spare yourself and be happy. But if you like roots-style gaming (playing for the pride and rankings versus some story or other driving force) and if you want to build up your PSN friend list, this is a quick way of doing it.
The friends list within toro should be seperate.
Well, it's a little stupid that it's not more robust, but that's kind of the point of the game, to meet people. Not being about to hit that magical 100-friend dance if you have PSN friends who don't own Vita (or just don't care about Toro,) but I have a feeling it's a fake goal, I can't imagine the game would actually "win" if you hit 100. I'm at I think 60 'friends' and nothing's really changed in the game since 33 friends (when the last area unlocked.) Maybe there's an exclusive bonus if you hit 100 friends, but you don't get anything special at any other stage in the home game (you can get exclusive items in the Dungeon, but the homescreen I think only allows HP & MP upgrading as well as Shop access.
So, don't sweat it, just play for whatever it's worth.
Also, it's really tedious clicking on people to find out if we are friends now. It should just do it automatically and give me a list of notifications.
Assign all your known friends Work on screens other than that opening home garden. Then the only people with pop-ups will either be new people or people with a message (which is worth clicking on anyway since it's worth a HP, but I get that it's annoying when dozens of those pop up on the screen right away and you have no idea which ones are important or not.) Also the four people farming your gardens will have a pop-up, but you'll know that they're already friends.
My enemy on floor 70 regenerated at least 3 times, maybe 4, and previously I'd never seen an enemy regen more than once. I used boosts and still ended up using 10 party potions to get through the fight, which seems to indicate that my stats are too low for the floor I'm on.
I haven't grinded higher floors too much (and I'm pretty high but I've only failed a battle maybe twice,) but in my experience revisiting floors, they don't seem to regen (or not nearly as much, at least) when you return to a battle, have you notice this phenomenon? Of course, the game isn't exactly tethered to its own rules (I've also seen friends with just 300ATK do 4,000 HP damage on an enemy, as well as have seen enemies do 800HP damage on me on Floor 6 out of nowhere... totally sucked, I was grinding for a quick ATK upgrade to take on a floor somewhere in the 40s and instead I had to wait a day because a chump-level enemy obliterated me.) But I have noticed very little to maybe no regen when going back for the 100% Treasure wins.