[Perdition]

I've noticed a trend with recent 10 stars that seem to be meant for basic attacking, or at least they have on hit/on crit effects or the like. They typically have at minimum 90 base accuracy and 5-10 base crit. Things such as Buzzing Chakram, Deadclaw (85 accuracy, but 10 crit), Mirror Spear... even Eternal Solitude has 90 accuracy and 5 base crit. Going back even further you have weapons like Tarnada and Anchor Edge with very optimized stats for basics in 95 base accuracy and 10 base crit. 

So, my suggestion is making Gigantys base 90-95 accuracy, and perhaps even 5-10 base crit. The weapon already suffers hit penalties in exchange for its power potential, so I think letting it start at higher base accuracy is more than fair.