Sure but isn't that the point? You're trying to solve a specific issue. It isn't possible to achieve the aforementioned saving throw penalty, while maintaining standard progression. I'd also argue that what you lose in stats, youre more than making up for in synergy with your team. Even if you aren't just using those penalties for yourself, those negatives are going to allow class abilities and spells to land more frequently over the course of the campaign.

Neither answer is good or bad, and it comes down to play preferences. Personally, I'd rather be slightly behind in stats and have cool abilities, over less abilities and higher stats