I have a suggestion for Valkor, Reklar, and Son of Gigaroth. To end the boring camping, a small quest should able to be done which will spawn him for the group once they reach the correct area (can still involve searching the possible spawns, he only pops after they reach the right zone and get within say 50m or so).
The quest could only be done once every 48 hours per sub on the account. i.e. 5 friends with 7 subs among them could do it up to 7 times in 2 days. In contrast to say 4 times in times in 2 days the old way (Drops will be split among more people so this effect balances itself out). The more subs a person has, the more they can spawn him. However 2 people with 2 subs would be limited to only 2 spawns in 2 days.
A small incentive for extra subs.
A way to end the camping.
Once a single character on an account performs the quest and he spawns, OR once a single character on an account does any damage to sog, is damaged by sog, or heals someone damaged by sog (any involvement in the fight whatsoever), then the counter on all involved accounts is advanced 48 hours preventing any characters on the account from doing the quest to spawn him. This will help avoid potential work arounds, as well as help people stay out of other groups' battles for fear of messing up their own timers. Accounts with multiple subs would have multiple timers, each started independantly. As long as one of the timers was at 0, the account could perform the spawn quest. Smaller more powerful groups would have the advantage over lower leveled, larger groups. But this makes sense.
Potential spawn locations of Valkor could include the festival crypt as well as all the new span locations, and perhaps even Western deadlands and the Eastern deadlands. When the character performing the quest to spawn a mob completes the quest, the npc tells him a vague "xXx was last seen around <location>" to at least give a general direction to head. Once the person on the quest gets within say 50m on the spawn location, he would pop.
I believe I've thought it out pretty well, what say you Vitrium? Players? If it turns out that 48 hours isn't quite long enough, could be adjusted after exerimentation.