questions about non-crit damage

[LeiKung]

I have a FS lv 132, i decided to give it a try and use my old FB gear, such as
OS katana +7 - 27% dmg
lapiz crystal +7 - 27% dmg
titanium helm +8 - %36 dmg
2xBoF+2
1 megaheph ring, 2 crit ring+1, 1 life absorb+5 ring
my pve combo is as follows: Shield Grenade(18)-Shield Splinter(18)-Shield Break(9)

The thing is my girlfriend plays WI and FA, and when we were on party in Lakeside 2, my non crit dmg was comparable with a terra cannon of hers. And since my skills took longer to execute, she got almost all hits from mobs and many times almost die or die, Instead of me, except when I crit, altough she crits very hard too.
My question is, will this always happen? or is there any way to avoid this sittuation? that my dmg is comparable in time whith a FA or WI?

What I mean is, my completer or trascender skills took 3 and 4 sec to cast, and do the same non crit dmg than a cannon of her which take only 2 sec at most, of course, when i crit I do better dmg that one cannon but, mobs stick to her and try to hit her instead of me. And i dont like this sittuation.