one piece card game extra booster - [EB-02] Anime 25th Collection Japanese Boo 02] includes many ways to strengthen Leaders from past packs One Piece Card Game -

Ideally you have a little in the way of things to protect your goblins so you can actually use them given all the effort needed to have them work

(Leads to: Cradle of the Death God) Oubliette Discard a card and sacrifice a creature, an artifact, and a land

Go-Shintai of Hidden Cruelty A 2/2 deathtouch for 4 mana is always just fine, even if its a bit below the curve, so youre already happy playing Go-Shintai of Hidden Cruelty

B lock A creature with protection from X cant be blocked by a creature of type X

If you do yourself and average of 0.33 damage a turn and your average game takes 6 turns you can assume your life total is closer to 18 than 20 in reality