[thejeff]

If most giants dropped a size category, it would be nice boost.
Neifels are already size 5.
Dropping the other giants from 4 to 3 would let 2 of them fit in a square and drastically reduce their swarming issues. Obviously, dropping hp/str might compensate for this.
I don't think the size/hp/str is really the problem with giants. If anything, their troops are usually consider poor already. The cold aura combined with staying power from E9N9 bless is the only real strength of the Neifel Giants.

Both Jotunheim and Utgard also have excellent mages outside their capital. Skratti are excellent mages and thugs in any age. Vaetti hags are cheap and so useful. Seithkonar are also cost-effective and very nice. Cheap Nether Dart spammers, if nothing else.