you cant dictate how i build characters

Technicaly yes i can :P

s not ever taking long to finish

I fail to see the need to finish a fight fast anyway. If you want speed, just RW Cloud USB.

im looking specificaly into a non elemental specialist

Yes you are, and i gave you a few including Master Monk who is in fact a non-elemental specialist although because of his LM2 and RD/LD he is simply a great monk overall for basicaly everything.

use elemental damage with monks

Unless you are talking about SB then i fail to see why you would use elemental damage with a monk, the only 2 elemental abilities monk have is Meteor Crush which lol no one uses that for damage, and Fire Within that is mostly used for the healing utility, which latter on becomes a good DPS option when it gets updated to 4 hits, hell we don't even have the Fire and Earth elemental X4 ST with 20% crit rate monk abilities yet. And even then those 2 abilities have better users anyway.

i understand hes the strongest option but for me specificaly i rather go with another character.

Ok fair enough, but the main argument here isn't even that anymore, you said that R3 life bane isn't enough, and you would need to pair it with Omega drive...which sounds ridiculous since well if you have a SB for Master Monk you can just pair Lifebane with LS for example, and if R3 Lifebane isn't enough you can just use a 2nd copy of Lifebane at r1 and boom you now have a r4 Lifebane :P

Also Master Monk can use Full Charge just as well, yes sure you would need to go thru the long casting time but that's hardly the end of the world.

Also you have 5 characters in your party, i find it unlikely you will be using only 1 character for DPS unless ofc you are using Cloud USB RW.

And besides Crystals will become farmable in the future anyway so honing 6* abilities will hardly be a problem.