1st Post... ROI, ITM drop due to multitableing

[allaboutheu]

I have been reading these forums for a few months but decided to make my first post today. I play predominanty STT and am now at the $22 level buy ins. I know the advantages to multitableing and would like to give it a try, but im curious what kind of drops I can expect in ROI and ITM. The other thing I am worried about is that a good deal of my play is read dependent. I'm afraid playing 2 tables at once would take away some of my reading skills. Any comments or suggestions would be much appreciated, thank you.