I can understand that with my gentleman-styled comment, you may have believed I was fooling around, but i was not !
In fact, when I found this out yesterday afternoon, I was super-duper thrilled, because I've been interested in the subclass for years, but I thought that with limited spell slots (especially at low levels), there wouldn't be enough surges for my liking.
Granted, this technique requires 2 "OKs" from your DM :
1. About the optional rules on feats (and, if you wish, about the Variant Human option, if you want to start out with the "a-surge-every-10-minutes")
2. About letting you roll on the Surge table whenever you are able to (every 10 minutes in that case).
But, it's not that hard to find the right DM for these two OK's. In fact, I know two DMs (with whom I play) who absolutely love a chaotic taste in their games, and letting more random funny moments happen is, for them, all the better.
Now let's go through the "out-of-combat-surge" utility : first, no matter what you get on the table, it's fun, so having fun is always useful.
Second, think about it : you have a chance to get effect #50 (get back sorcery points) every 10 minutes for free ! (so if you play smart and already have all your points converted into slots, eyyyy!)
Other effects that can be beneficial in out-of-combat situations :
-Roll on table for next minute (cause you can get the other goodies)
-See invisible (if a sneaky baddy is sneaking on your group, eyyyy!)
-HP regen (if you were scratched before, eyyyy!)
-Third eye (if you're searching for something, which would make sense if the ritual you just casted is Detect Magic, eyyyy!)
-Ninja teleport (if there's a platform up there you can't quite reach, eyyyy!)
-Self-heal (see HP regen)
-Ninja teleports for the next minute (see Ninja teleport)
-Levitate on self (see Ninja teleport)
-Immunity to alcohol intoxication (if you're in a drinking competition, eyyyy!)
-Fire-starter (if you want to intimidate some thuggies, eyyyy!)
-Spell-slot recharge (same as when you get back sorcery points, just less powerful at high levels, but still, eyyyy!)
-Resistance to everything (if you wanna show that you're a tough guy and jump off a cliff or something, eyyyy!)
-Extra action (if you wanna do many many things, eyyyy!)
-Free mirror image (if you're a sneaky baddy, eyyyy!)
-Personal invisibility and inaudibility (see mirror image)
-Free reincarnation (if you're feeling like dying... hahahahaha)
Of course, there's also things that will be detrimental to you, but if you like playing the lottery, the Ritual Caster feat will please you ! (sorry for all the eyyyys, I just find that it sounds cool to write it, hehee)
Edit: I forgot to adress the 13 Int/Wis dip in order to fet the feat. Well, if you intend on being a pure wild mage up to level 20, it's not optimal. However, if you plan on doing a 1-2 levels dip on a wis or int based class (like a diviner wizard 2 for the extra portent luck), then it's good !