witchling stalker is a good choice for 4 points austringer is great for 5 (there better in a pair) the stalker with buffs from LJ can be a monster in melee and the range from the austringer is always helpful
a watcher good objective grabber for 3 points...
The list could get longer guild has a good assortment of minions for 5 and under it realy depends on what you need for your strat and schemes.
but these are good all around choices