In the current meta, you're required to spend at least 500-1000 usd per store promo Do you? If you don't then why even bother playing?
About the skills, it's not really true. Played Tyrr literally for a decade and only those skills that don't need a target to use will flag you, this goes for any class really, including feoh or archer (snare, phoenix arrow).
And besides, you always have the option to change from duelist to a GK or DN, which might boost your damage.