Dont know if it is common sence or notits been a while since i last shared summit with the comunity but here it goes.. This requires to summon your pet first. Take a pet that costs a soulshard to summon. If u try to summon a different minion wile u already got 1 active youre current gets stunned for a sec. Just cancel the summon and move forward as the stun goes of your minion summon and cancel again. This way your minion will stay at his spot and you move away. if you get to far away you will eventualy get your soulshard back ^^ wich makes the summoning of a different minion free.
step by step
1 summon minion
2 start summoning another minion but cancel str8 away by moving
3 repeat 2 till youre minion leaves u
4 obtain youre shard back
5 summon youre other minion
This can be quite usefull for the situations where u might need to change your minion but you dont have enough shards ^^
anyways try not to flame but constructive critisism is alowed :P
peace out
:edit: this works for all minions that cost shards to summon so not youre imp ^^