Simulacrum as a Titan

Well.. I am lvl 95. I have 87 Armour phys reduction at 5000 hp.
I am at 84 max resists with 75 max chaos.

I use sunder as main skill and i can destroy tier 18 with all mods possible.
Now, my question is how am i supposed to do simulacrums, if they come so fast and my channel for sunder is like 4 seconds where i jump in the air and i am literally a sitting duck for that channel?? How did you guys think this is a good mechanic?
Should i just go spark like everyone else who destroys everything around on an area of 2 screens? or should i go minions? I really do not understand your decisions when it comes to melee. I attack once every 4 seconds and i am completely vulnerable when 15 mobs are coming from all directions. how does this compare with other meta skills? Do you think it is fair?