Hello and Welcome to LS

First of all, you should keep going on solo until you will be slowing down a lot, when your weapon is not efficient anymore etc..
you've probably read a fighter guide but I have to say, most of them are a bit outdated

dext is not as powerful as it used to be

right now
at lvl 60+ ( you gain 1 stat per lvl )
you should have ( with your stuff on) around 100-120 dext
and 120+ str
str will give you more constant and high dmg while dext will help you get some critics and def

if you're lvl 10, you might want to buy a new weapon

lvl 10 50-60+ ee would work much better!
so, you have 2 choices :
1) keep putting stats into dext until you reach 100-120 dext then all in str and buy some str stuff
2) put all your stats now into str and dext stuff to reach 100-120 dext ( maybe a dext charm + a str armor or a EE armor )
have fun and feel free to post again if you have any questions
