He said "We are trying a houserule..." so I wouldn't necessarily interpret that to mean he is the GM and THINKING about having such a house rule. It sounds, to me, more like the participants agreed to have this as a house rule, and that it is already set in motion. We also know there are 2 players, so it seems like a little get-together kinda game to try something out and play some 4, right @
ZickZak?
Truthfully, all our commentary along the lines of "here's why you might not want to do this" are kinda going against the point of the thread if I understand it correctly. The OP didn't ask if this was a bad idea, it just asked what would be a good build given that this IS the rule. Given that he asked about a build, I am guessing he's one of the players. Nothing wrong with us commenting that we're dubious about the whole affair, but in the end I think that for them 'Solved' just means they're going ahead and the consequences will have to be dealt with in whatever fashion.
I think its cool to play variant 4e. Much fun.