1mana monsters

The problem with that is it pushes K-Army Guy into the 20+ damage for stat break-point range.
I'm not saying it's a bad suggestion, just that there seems to be a taboo against 1 costers that can deal 20 or more damage to another monster. My problem with that taboo, however, is that K-Army Guy is a dark monster with low life, and those kinds of dark monsters typically are capable of bringing down monsters that are 1-2 cost above them:

So is +20 attack for 1 costers fine as long as it's part of an ability and not the base stats?