Welcome to Librarium Online!
Playing my second game of 40k this edition, first was a trouncing of tyranids. This game will be against Eldar with my opponent likely to field an avatar, a couple of units of swooping hawks and he has pretty much everything else as well.
My initial thoughts were something like this:
Big Mek SAG 95
10 Lootas XX
10 Lootas XX
12 Hardboyz - Nob PK - Trukk Reinforced Ram - 195
12 Boyz - Nob Pk - Trukk Reinforced Ram-147
11 Grots Runtherd 43
5 Bikers - Nob PK - 160
3 Kannons XX
A fair amount of shooting, 3 reasonable combat units. Not too many killpoints.
Bosspoles literally mean the difference between victory and defeat for the Orks. They statistically raise a unit's leadership by 2, usually from 7 to 9, giving them a much better chance of passing leadership checks, and staying in the fight longer. I wouldn't use warbikes or trukkboyz without them.
For points, you could shave a single loota off one or two of the units. If you bring both unit down to 9, you'd also have enough points to give the SAG cybork armor and an ammo runt, which I would do.
Otherwise the list looks like a very good start. Just be sure to keep the trukks obscured in or behind cover until you're ready to strike.
"Any job worth doing, is worth doing with a powerklaw."