Would be good to have a co-leader, if the clan leader is away or anything (have same permissions as leader)
For the most part, R4's have the same permissions as the leader. The only things an R4 cannot do are disband or transfer ownership of the clan, or set the clan hive location. Also, if the R5 goes inactive for a period of 30 days, the highest might R4 will be promoted to R5.