AbdulAlhazred
Legend
I mostly agree with this, sounds like a fun exercise. Show me a highly effective gnome warden, that one's been troubling me for quite some time.
Gnomes do seem to put the system to its hardest test, but I think you could make a pretty decent gnome warden. Their racial traits are going to be fairly unhelpful to a warden for the most part, but lets work with it.
I'd concentrate on being stealthy and mobile and try to play it up as a character that can scout ahead and take care of himself if he's jumped. He's going to be a reasonable defender obviously. There are a couple of MC options you'd have that might work reasonably well. Rogue perhaps. Wizard is an obvious possibility. Anyway, I'd envisage the character as a sneaky sort of scout that can use his powers to get himself out of trouble if he runs into trouble while acting as party advanced scout and then falls back into the line of battle when the fighting gets hot and heavy.
I think that would work OK and the cool thing about it is working within the limitations of this very "off" combination definitely stretches your ingenuity. What would be particularly original about simply making a dwarf warden and calling it a gnome? Dwarf wardens are a dime a dozen regardless of how you skin them. Not that dwarf is the only best choice, but if you just reskin characters to whatever race then 70% of the choices that would make really interesting and unique characters will never get played.
And yeah, it will certainly be a 16 prime req character, lol. Honestly it probably will be slightly underpowered, but you have to admit its about THE most non-optimal build in the game. I can't think of one that has less natural synergy. Yet it will work reasonably well and is certainly playable and probably a lot of fun for that player who's into it as a concept.