convoking wand Mult craft help

Hi, i'm new in here and my english is so rusty...
i need help with choice my craft

i Have one Convoking wand With +1 minions gems and +1 Spell gems
and i need a mult craft in here , my first question is , how many mods i could use with a mult mode some guys told is 2 but i se in videos the people craft 3 and if i only does craft only 2 what is best Minion Attack speed or Minion damage with a Trigger Spell and with the mod line empty have any good for one good Augment with harvest or Awk orb i don't now

i'm new with a Craft in PoE

i really thx for all