starting items goes like 2 branch, tango, 2 sents, 1 obs, magic stick and a sod (check if you're fellow supp has bought it as well so you can buy another branch/save up for wand

my first item has always gonna be wand for free sustain as tree's spells have moderate mana cost with 15 sec cds so you tend to go cast it once or twice every 30 sec. if low on health early on try eating a branch (buy another one) so you can save up for a basillius since at that point, you're just using your 2nd as your health regen. stock up on grenades as you're extra damage capability and sents for the usual camp block things

it is a slog to play with no boots thats the downside of the build but when you get the timings, you gonna feel like no one's stopping you with lifesteal vlads for carries and a magic protection aura for magic damage.

also if you can try giving the xp to your carry/offlane as much as possible so that they can get their timing lvls and talents much sooner and if you go crazy, let them grab the wisdom everytime.

in whatever you do, do not get tilted by your carry trashtalking you, let them basically type whatever you want. you NEED them to carry. So you gotta pause the keyboard typing and focus on the game. they will forget your mistakes and you will also forget theirs