first off, your math is a little off on your librarian - he's 230pts total! lose the combi-melta and give him just a bolt pistol for the extra attack... also, keep in mind that you can't use might & the death stick's one-shot kill ability in the same turn...
i'd honestly try and cheapen him up a little bit as he's pretty expensive - go for just a codicer as being an IC, he'll never count as a scoring unit anyways!
unless you give the high priest an exsanguinator, swap him for a chaplain... the chaplain can get alot more death company *and* has litanies of hate so you're not gaining anything right now. (you're infact giving up the possible 3+D3 death company!)
plus the chappy comes with a solid invulnerable save & power toy!
lose the krak grenades on all your scout squads... for the cost they're not worth it! more men is better!
up the snipers to at least 6 for scoring unit purposes...
never use units of 3 attack bikes as once 2 die, you give up half VP's and the unit loses its scoring status... also don't mix anti-tank multi-meltas with the hoard busting heavy bolters! (just stick to multi-meltas!!!)
for some fast anti-hoard fire power, you don't get any better than a pair of tornados w/heavy bolters + assault cannons! run them up just behind the bikes so that any enemy trying to target them 1st has to pass a target priority test too!
scout bikers are still a good option, simply because they come with the 'scout' USR! that's a 12" move before the game even starts, which can either be used to bluff your opponent during deployment and/or quickly make the bikers into a more threatening target and thus protect say your anti-tank units!
hope this helps,
cheers!