This is my GB deck, plz give me ur opinions about it and how can i improve it

Thanks for your time

-3 test tiger --> +1 laquari +2 shrink
-3 waboku --> +1 trap dustshot OR mind control +2 BTH
these 2 cards are the worst choice for GBs. Why? Using tiger just to get the eff of a gb right away is good on one hand, but on the other, if you have shrink instead of him, you can destroy an opps monster (if you are afraid of prison etc let your opp atk you next turn then) and get the gbs eff still. A monster with 3000 atk against a gb with 1600 atk or higher cannot win if u have shrink, and you get another gb if you want at end phase. Waboku is not needed if you have 2 shrink and 2 forbidden lances which you can use in opps turn, while u have 2 smashings which u can use in your own turn ofc. Why stopping somebodys atk if you can simply BTH him? A trap dustshot is just another stapple in your deck good for this format. Mind control is an option, you can get opps tuner or lvl 4 monster for sync or exceed, or just free your way for atk.
-1 secutor --> +1 GBs proving ground
Secutor slow, proving ground faster.

Idk bout prisma tho.

I'm actually testing Tiger again...just because the format is fast and sometimes you need to kill something fast. Also it can open up some xyz plays if you really have to. Besides that, until i decide what to do about that:
-2 smashing
-1 secutor
-3 waboku
-2 prisma
+2 thunder king
+1 dustshoot
+2 bth
+1 mind
+1 book
+1 grand mole

well, whats better to draw in your opinion harper, evacuation device or either grandmole OR that lil tiger xD

It depends on the situation really. If you need to grab control of the game early but they have a Raioh, compulse and mole aren't going to do much good. Tiger + a gb into laquari into a Bestiari on the other hand, would help. I haven't used Tiger in years, but this format is faster than...well...probably faster than it's ever been. Like I said, I haven't tested it much yet, and I'll probably wait to see the banlist anyway since it's not all that far away

k, its all cool