QUOTE (Draco18s @ Feb 14 2013, 06:48 PM)

Here's the thing.
Force 4+ does not "ruin the game."
Force "above your magic rating" ruins the game. And that already hurts you pretty bad to summon them, and is out of reach of most PCs to bind (by RAW, no edge involved*).
(Well, objectively speaking, there's a critical threshold on some spirit abilities, due to the way the rules are written, that end up breaking things in other ways. But for the most part these aren't a problem until Force 7+)
*Force 7 rolls 14 dice. The mage rolls 6 MAG + 6 Binding = 12 dice, looking for more successes. On average, that's going to be nil.
Never said it did... I said that we tend to limit the Force of spirits in play by having them spend Edge if they are Force 4+. You can still summon Force 6-8 Spirits in the game, and we have had a mage or two do so in dire need (One at force 7 and one at Force

. But it limits the occurrences of such spirits greatly, which is the intent. Otherwise, you have characters starting play with Force 10 spirits, which is a common occurrence apparently for many here on Dumpshock. Well, guess what... We do not have that problem in our game. *shrug*
Your Numbers are off, though. From what I have seen here on Dumpshock, the Summoner build has 6 Summoning, 6 Magic, Mentor Bonus (+2), Power Focus Bonus (+4, commonly stated to be stupid if you do not have this) and Specialty (+2). That equals 20 Dice (18 for Binding)... Imagine That. You can effectively go up to Force 10 (with that DP) at our table and have the opportunity to actually succeed at your summoning, and Force 6 for a Solid Binding. And if you are using the craziness: 9+9 for Base Drain is 18 Dice (Assuming you are a Human with Max 9's). With a bit of Karma, you can add in a few points of Initiation and a Centering Focus/Centering Metamagic, and you are well over 20 DP for Drain.
So, even with Spirits spending Edge you can conceivably summon a Force 10 Spirit. But you know what? It ain't so common at our table, and we do not even need house rules to accomplish that. We just allow the Spirits to use Edge. And you know what? We do not have spirit issues in our game, and there are TONS of spirits in play. Just not Force 6+, most of the time. They are in the Force 1-5 (Average of Force 3, I would bet) range. Which is where they should be, in my opinion, more often than not. *shrug*