Nope, use on lucky dice, you can get better value of them and some extra goodies in my opinion. You get free magatamas from ninja exam sweeps, daily activity bag (this week event), nine tails, sealed etc.

Save for Lucky Board and use them on Lucky Board, its the most * for buck as an f2p.

I'm f2p, and I only spend my coupons on Lucky Board. I don't spend on anything else, and don't be a Pokemon collector. Concentrate on power.

Save for dice! The Lucky Ninja Pack for completing rounds of the dice board has a high chance of giving you magatamas.

If not, spend some on cave runes, those help boost bp quite a lot.

save it dude im alway save to 1k5cp and spend it in stragegy rune gem mood refine etc it'll boost ur power up :lol

Lucky board you got 2lvl magatana more cheap, Seal and summoning scrolls and frags, purify runes, Medium lvl refine runes, and the points for exchange for more stuff..

for me its the best event,