Oops, thanked KoboldLord's message by accident, so now I must reply, because I disagree.
KoboldLord wrote:Boggarts are a tactically interesting monster, and we need more monsters like them.
While "more tactically interesting monsters" is a good direction to go in, it doesn't mean that they should be like boggarts at all.
For one, monster summoning should really be kept in check because that's one mechanic that, mishandled, easily becomes tedious and/or annoying, sucking the fun out of the game (which happened in an awful lot of roguelikes, though DCSS handles that aspect very well so far).
Also, boggarts have jarringly weak flavour - a little goblin summoning all kinds of random monsters for some reason strongly reminds me that it's a game and it does that to accomplish some gamy things. It would be better if it summoned some fairy-themed monsters or perhaps the shadow creatures looked different. Come to think of, that might be material for a new suggestion, because I think they are already marked as summoned, it's just not visible on the map. Hmmmm...
So, to sum up, boggarts are fun, but could be more so if their abilities felt more flavourful, yet in the search for tactically interesting monsters summoning should be approached very very cautiously.
Sadly, once you get past the early game it's very possible to blow off ranged weapon skills entirely, so many players don't even bother carrying such a useful tool.
Perhaps more people would bother to carry a ranged weapon if maintaining your ammunition wasn't so awfully bothersome.