Gankplank tips for cautious player

As title says i play cautiosly as offtanky grasper gankplank any tips to improve myself ?? My strategy is simple: 1 Take Cull and pot 2 farm gold with q 3 Level only q w r till level 13 and tf builded 4 Poke enemy with grasp q 5 Build defenses according to dmg dealt by my oponent on top and according to strongest enemy player: usually it goes to tabi,angel and maw 6 build lifesteal ravenous hydra due to aoe heal and suprising q aoe (my reflex is too slow to quickly put barrels ,i use them only for farm or backing off) 7 Ultimate mostly i use in self defense or if opportunity allows to attack oponent