cc wiki:
http://castle-clash.wikia.com/wiki/Fortress_FeudStrategy:
Although its possible to create 3 separate teams at the
beginning of each round, i think it's better to make one
very strong team. Based on prior FF's, we have seen
that only a few strong teams can dominate the round,
by killing many other teams and gaining a huge amount
of points. If your main team dies, you can then make
3 weaker teams, and help delay the takeover of any
fortresses that we are currently holding. Keep remaking
teams, and reinforcing, if they die.
If one of our teams is having success holding onto a
key fortress or chokepoint, other strong teams should
try to branch out, so we won't have strong teams
sitting idle, and therefore not gaining any points.
Most guilds will try to take the large fortress in the
center of the map since it's worth the most capture
points. Unless we are grouped with weaker guilds
and can easily hold onto the center fortress, it may
be better to control several other smaller fortresses
instead. This is something we will have to decide on
the fly, based on the strength and actions of our
opponents.
Another strategy seems to be to advance towards
the other corners, to block the progress of any
teams leaving their base. This has been done to
us in the past, making it difficult for us to launch
new teams from our base. Depending on how many
strong players we have online, this is a strategy we
can use to our advantage.