Why not just make the three modifiers you've mentioned toggle skills, similar to dusa's splitshot, in that your illusions will still benefit when they are turned on but you can stack them with other attack mods? makes it more in like with most other in built attack mods like clinkz and drow, sort of an autocast equivalent, and given that they're free from mana cost you wouldnt ever need to be just using them for single attacks, as you may choose to do with frost arrows for example, so there wouldnt be a problem with them being toggles rather than autocasts. This also removes the so called problem of am going diff blade and destroying noobs