Faendal was easy to dispose off, he sleeps alone in his house so I crept up to him and froze him solid.
I noticed that Sven spends most of the night at the local bar/inn so I first went to his house to kill his mother and waited until he returned. As soon as he stepped into his home I dealt with him appropriately.
All three murders were carried out stealthily.
Anyways, both of those men were planning to deceive Camilla into thinking the other one wrote a foul letter to her so they didn't deserve to be with her.