I was more scared about the perceptive and acrobatic defender as it is easier to rise your skill far over 6 [natural max for humans, seems to be a good point of discusion]. It is doable to rise full defence dice pool for an adept up to 40* at character generation, and that is scary!
But: It was mentioned in few topics of mine and there are some conclusions. The Limits. As they have to be rised to some level to let
it be usefull. About 10, or higher for physical is quite easy*, and I don't see an ocasion that would require more, oh, and you always have edge to break it.
*It is all about Adept. Mentor spirit, improved potential, and some other things make it worth it.
2.But: Initiative, at such a dramatic score, the initiative is hard to max. The problem would solve a mage with increased reflexes spell, or beeing a mystic adept capable of casting it**.
3.But: Points, it is a hell of a build. And it is hard to make it god at more than few things. It would propably use 2-3 skills based on REA, STR, INT, AGI[optional] as this would be his primary focus. So he could fill ap one role, combat specialist. With low CHA, WIL & LOG/
4.But: As a combat specialist he is not going to be a tank. No way he could really make a difrance, becouse enemy would have no problem with shooting his friends rather than him.
**A Mystic adept is a nice idea... with some problems. As there are only two traditions that use WIL or LOG for drain, [preferably you could not use AIG in build, and use those point for CHArismaitc elf

], or convince your GM to let you use a Bhuddistic tradition from 4ed, that resists drain on INT
5. If you really consider a mystic adept, thing about a spellslinger.
As a promised, here is a link to such a build. Still, i just caped the Full Defence Dice Pool at about ~30 +/-5
http://forums.shadowruntabletop.com/index.php?topic=16787.msg296783#msg296783