Science rank up. Have 2-3 and 3-4 gem , who?
I just finished XL variant and got a 2-3 and 3-4 science gem and I am torn about who to rank up. I run suicides and have a pretty stacked roster but have not yet Finished act 6. (On 6.2)
I don’t have any specific holes to fill ... but I’m not exactly sure what my act 6 short comings will
Be. 
Are any of these A significantly  better rank up than the other ?  Who should go to rank 4?  
My only slow champ is dragon man (r5) ...
Other R5/4  science champs capiw , torch , void , thing , and wasp. 
I’m leaning toward immortal abomination for his untitling and being useful in war D or diss track cav but not sure if red guardian (unduped) will help in act 6 Enough to warrant a rank up. 
The other options are all champs I like but have always pushed them aside. 
Thanks for your opinion!